Mixture of helium + Methane

Datasets

1. ρ_g - Mass density, kg/m3 (4)
2. c_sound,fluid - Speed of Sound, m/s (2)

Mass density, kg/m3 [ref]

Fixed			Measured
Temperature, K - Gas	Pressure, kPa - Gas	Mole fraction of Methane (2) - Gas	Mass density, kg/m3 - Gas
250.03	19568.00	0.9500	198.473
250.03	19042.00	0.9500	194.564
250.03	18043.00	0.9500	186.653
250.03	17044.00	0.9500	178.081
250.03	16039.00	0.9500	168.759
250.03	15012.00	0.9500	158.475
250.03	14031.00	0.9500	147.94
250.03	13018.00	0.9500	136.433
250.04	12014.00	0.9500	124.477
250.04	11028.00	0.9500	112.43
250.04	10020.00	0.9500	99.991
250.04	9010.00	0.9500	87.651
250.04	8002.00	0.9500	75.657
250.04	7002.00	0.9500	64.244
250.04	6001.00	0.9500	53.364
250.04	4999.00	0.9500	43.071
250.04	3998.00	0.9500	33.382
250.04	2998.00	0.9500	24.279
250.03	1991.00	0.9500	15.651
250.04	998.00	0.9500	7.621
275.01	19598.00	0.9500	164.546
275.01	19027.00	0.9500	160.36
275.01	18027.00	0.9500	152.751
275.01	17024.00	0.9500	144.735
275.01	16005.00	0.9500	136.235
275.01	15019.00	0.9500	127.693
275.00	13990.00	0.9500	118.505
275.00	13015.00	0.9500	109.579
275.00	12010.00	0.9500	100.248
275.00	11003.00	0.9500	90.832
275.00	10007.00	0.9500	81.538
275.00	9005.00	0.9500	72.274
275.00	7999.00	0.9500	63.141
275.00	6999.00	0.9500	54.27
275.00	5998.00	0.9500	45.638
275.00	4999.00	0.9500	37.306
275.00	3998.00	0.9500	29.247
275.00	2997.00	0.9500	21.492
275.00	1997.00	0.9500	14.036
275.00	997.00	0.9500	6.868
299.96	19947.00	0.9500	142.569
299.96	19019.00	0.9500	136.456
299.96	18012.00	0.9500	129.617
299.96	17014.00	0.9500	122.639
299.96	16012.00	0.9500	115.449
299.96	15009.00	0.9500	108.1
299.96	14009.00	0.9500	100.634
299.96	13003.00	0.9500	93.029
299.96	12004.00	0.9500	85.416
299.96	11004.00	0.9500	77.78
299.96	10001.00	0.9500	70.115
299.96	9001.00	0.9500	62.524
299.96	8000.00	0.9500	55.004
299.96	6998.00	0.9500	47.579
299.96	5998.00	0.9500	40.294
299.96	5008.00	0.9500	33.227
299.95	4021.00	0.9500	26.333
299.96	2999.00	0.9500	19.372
299.96	2002.00	0.9500	12.753
299.96	997.00	0.9500	6.264
324.95	19715.00	0.9500	123.531
324.95	19000.00	0.9500	119.317
324.95	18002.00	0.9500	113.32
324.95	17003.00	0.9500	107.193
324.96	15998.00	0.9500	100.92
324.96	15005.00	0.9500	94.63
324.96	14000.00	0.9500	88.182
324.96	12999.00	0.9500	81.698
324.95	12000.00	0.9500	75.193
324.96	10998.00	0.9500	68.639
324.95	10002.00	0.9500	62.122
324.95	8999.00	0.9500	55.577
324.95	8000.00	0.9500	49.095
324.95	6996.00	0.9500	42.63
324.95	5997.00	0.9500	36.261
324.95	4997.00	0.9500	29.964
324.95	3996.00	0.9500	23.752
324.96	2997.00	0.9500	17.648
324.96	1991.00	0.9500	11.608
324.95	997.00	0.9500	5.755
349.94	19941.00	0.9500	111.598
349.94	19004.00	0.9500	106.652
349.94	17994.00	0.9500	101.235
349.94	16998.00	0.9500	95.804
349.94	15998.00	0.9500	90.27
349.94	14995.00	0.9500	84.662
349.94	13996.00	0.9500	79.008
349.94	12990.00	0.9500	73.276
349.94	11994.00	0.9500	67.563
349.94	10993.00	0.9500	61.799
349.94	9999.00	0.9500	56.06
349.94	9000.00	0.9500	50.297
349.94	7997.00	0.9500	44.519
349.94	6996.00	0.9500	38.775
349.94	5996.00	0.9500	33.066
349.94	4995.00	0.9500	27.399
349.94	3997.00	0.9500	21.795
349.94	2997.00	0.9500	16.237
349.94	1989.00	0.9500	10.705
349.94	997.00	0.9500	5.331
374.93	19944.00	0.9500	101.307
374.92	18996.00	0.9500	96.766
374.92	17973.00	0.9500	91.8
374.93	16992.00	0.9500	86.972
374.92	15983.00	0.9500	81.95
374.92	14981.00	0.9500	76.903
374.92	13990.00	0.9500	71.871
374.92	12991.00	0.9500	66.756
374.93	11991.00	0.9500	61.606
374.93	10985.00	0.9500	56.398
374.93	9988.00	0.9500	51.222
374.93	8990.00	0.9500	46.028
374.93	7989.00	0.9500	40.819
374.93	6995.00	0.9500	35.65
374.93	5994.00	0.9500	30.458
374.93	4995.00	0.9500	25.296
374.93	3996.00	0.9500	20.159
374.93	2998.00	0.9500	15.064
374.92	1985.00	0.9500	9.932
374.92	997.00	0.9500	4.962
400.00	19908.00	0.9500	92.835
400.00	18968.00	0.9500	88.715
400.00	17980.00	0.9500	84.322
400.00	16970.00	0.9500	79.783
400.00	15982.00	0.9500	75.296
400.00	14971.00	0.9500	70.659
400.00	13973.00	0.9500	66.035
400.00	12972.00	0.9500	61.369
400.00	11976.00	0.9500	56.692
400.00	10988.00	0.9500	52.036
400.00	9990.00	0.9500	47.301
400.00	8986.00	0.9500	42.531
400.00	7987.00	0.9500	37.772
400.00	6992.00	0.9500	33.027
400.00	5994.00	0.9500	28.272
400.00	4996.00	0.9500	23.52
400.00	3996.00	0.9500	18.766
400.00	2996.00	0.9500	14.035
400.00	1988.00	0.9500	9.288
400.00	997.00	0.9500	4.638
250.03	19935.00	0.8999	181.673
250.03	19046.00	0.8999	175.211
250.03	18041.00	0.8999	167.461
250.03	17031.00	0.8999	159.171
250.02	16033.00	0.8999	150.497
250.02	15029.00	0.8999	141.278
250.02	14024.00	0.8999	131.6
250.02	13025.00	0.8999	121.592
250.02	12015.00	0.8999	111.18
250.02	11015.00	0.8999	100.697
250.02	10007.00	0.8999	90.057
250.02	9008.00	0.8999	79.589
250.02	8001.00	0.8999	69.241
250.02	7001.00	0.8999	59.241
250.02	6000.00	0.8999	49.577
250.02	4999.00	0.8999	40.31
250.02	4002.00	0.8999	31.484
250.02	3000.00	0.8999	23.024
250.02	2000.00	0.8999	14.974
250.02	998.00	0.8999	7.291
275.00	18804.00	0.8999	144.712
275.00	18024.00	0.8999	139.174
275.00	17008.00	0.8999	131.721
275.00	16019.00	0.8999	124.219
275.00	15016.00	0.8999	116.391
275.00	14013.00	0.8999	108.363
275.00	13002.00	0.8999	100.126
274.99	12009.00	0.8999	91.938
274.99	11018.00	0.8999	83.711
274.99	10003.00	0.8999	75.27
274.99	8999.00	0.8999	66.981
274.99	8002.00	0.8999	58.832
274.99	6999.00	0.8999	50.769
274.99	5998.00	0.8999	42.884
274.99	4997.00	0.8999	35.184
274.99	3997.00	0.8999	27.702
274.99	2997.00	0.8999	20.437
274.99	1991.00	0.8999	13.357
274.99	998.00	0.8999	6.585
299.95	19681.00	0.8999	130.063
299.95	19009.00	0.8999	125.943
299.95	18016.00	0.8999	119.734
299.95	17022.00	0.8999	113.365
299.95	16006.00	0.8999	106.706
299.95	15003.00	0.8999	100.01
299.95	13987.00	0.8999	93.126
299.95	13009.00	0.8999	86.415
299.95	12007.00	0.8999	79.484
299.95	11000.00	0.8999	72.492
299.95	9995.00	0.8999	65.501
299.95	9002.00	0.8999	58.607
299.95	7997.00	0.8999	51.678
299.95	7000.00	0.8999	44.863
299.95	5998.00	0.8999	38.093
299.95	4998.00	0.8999	31.436
299.95	3997.00	0.8999	24.884
299.95	2997.00	0.8999	18.458
299.95	1989.00	0.8999	12.112
299.95	997.00	0.8999	6.006
324.96	19926.00	0.8999	116.277
324.96	19015.00	0.8999	111.31
324.96	18005.00	0.8999	105.694
324.96	17002.00	0.8999	100.013
324.96	15999.00	0.8999	94.246
324.96	14998.00	0.8999	88.403
324.96	14003.00	0.8999	82.534
324.96	13003.00	0.8999	76.57
324.96	12000.00	0.8999	70.552
324.96	10999.00	0.8999	64.52
324.96	9998.00	0.8999	58.468
324.96	8995.00	0.8999	52.405
324.96	7994.00	0.8999	46.366
324.96	6998.00	0.8999	40.385
324.96	5996.00	0.8999	34.403
324.96	4997.00	0.8999	28.498
324.96	3997.00	0.8999	22.64
324.96	2998.00	0.8999	16.862
324.96	1997.00	0.8999	11.149
324.96	997.00	0.8999	5.523
349.94	19921.00	0.8999	104.6
349.94	18995.00	0.8999	100.043
349.94	17984.00	0.8999	94.992
349.94	16992.00	0.8999	89.961
349.94	15993.00	0.8999	84.83
349.94	15003.00	0.8999	79.68
349.94	13990.00	0.8999	74.36
349.94	12999.00	0.8999	69.108
349.94	11988.00	0.8999	63.714
349.94	10989.00	0.8999	58.36
349.94	9989.00	0.8999	52.977
349.94	8992.00	0.8999	47.601
349.94	7995.00	0.8999	42.22
349.94	6993.00	0.8999	36.826
349.94	5995.00	0.8999	31.461
349.94	4996.00	0.8999	26.119
349.94	3995.00	0.8999	20.798
349.94	2997.00	0.8999	15.529
349.94	1989.00	0.8999	10.253
349.94	997.00	0.8999	5.112
374.92	19912.00	0.8999	95.374
374.92	18997.00	0.8999	91.271
374.92	17991.00	0.8999	86.7
374.92	16856.00	0.8999	81.471
374.92	15992.00	0.8999	77.441
374.92	14990.00	0.8999	72.73
374.92	13966.00	0.8999	67.866
374.92	12998.00	0.8999	63.225
374.92	11986.00	0.8999	58.341
374.92	10989.00	0.8999	53.503
374.93	9991.00	0.8999	48.64
374.92	8994.00	0.8999	43.761
374.92	7988.00	0.8999	38.828
374.92	6992.00	0.8999	33.941
374.92	5995.00	0.8999	29.05
374.92	4996.00	0.8999	24.159
374.92	3993.00	0.8999	19.262
374.92	2996.00	0.8999	14.413
374.92	1997.00	0.8999	9.577
374.92	997.00	0.8999	4.766
400.00	19812.00	0.8999	87.449
400.00	18956.00	0.8999	83.913
400.00	17982.00	0.8999	79.843
400.01	16970.00	0.8999	75.567
400.00	15958.00	0.8999	71.246
400.00	14977.00	0.8999	67.013
400.01	13983.00	0.8999	62.689
400.01	12965.00	0.8999	58.225
400.01	11979.00	0.8999	53.869
400.01	10985.00	0.8999	49.453
400.01	9991.00	0.8999	45.009
400.01	8984.00	0.8999	40.487
400.01	7987.00	0.8999	35.996
400.00	6994.00	0.8999	31.514
400.01	5990.00	0.8999	26.977
400.01	4993.00	0.8999	22.465
400.01	3997.00	0.8999	17.962
400.01	2996.00	0.8999	13.446
400.01	1996.00	0.8999	8.941
400.00	997.00	0.8999	4.458

Mass density, kg/m3 [ref]

Fixed			Measured
Temperature, K - Gas	Pressure, kPa - Gas	Mole fraction of Methane (2) - Gas	Mass density, kg/m3 - Gas
240.04	19915.00	0.9500	217.591
240.05	19037.00	0.9500	211.432
240.05	18026.00	0.9500	203.713
240.05	17023.00	0.9500	195.305
240.05	16022.00	0.9500	186.059
240.05	15023.00	0.9500	175.881
240.05	14013.00	0.9500	164.584
240.05	13016.00	0.9500	152.406
240.05	12015.00	0.9500	139.257
240.05	11009.00	0.9500	125.326
240.05	10010.00	0.9500	111.115
240.04	9003.00	0.9500	96.823
240.04	8003.00	0.9500	83.039
240.05	7001.00	0.9500	69.896
240.05	6000.00	0.9500	57.586
240.05	4999.00	0.9500	46.133
240.05	3998.00	0.9500	35.506
240.05	2998.00	0.9500	25.657
240.05	1998.00	0.9500	16.504
240.05	998.00	0.9500	7.97
250.00	19784.00	0.9500	200.072
250.00	19016.00	0.9500	194.396
250.00	18017.00	0.9500	186.477
250.00	17019.00	0.9500	177.898
250.00	16011.00	0.9500	168.529
249.99	15017.00	0.9500	158.56
249.99	14013.00	0.9500	147.789
249.99	13013.00	0.9500	136.403
249.99	12011.00	0.9500	124.468
249.99	11003.00	0.9500	112.149
249.99	10007.00	0.9500	99.845
249.99	9004.00	0.9500	87.584
249.99	8002.00	0.9500	75.669
249.99	7000.00	0.9500	64.219
249.99	5997.00	0.9500	53.324
250.00	4998.00	0.9500	43.065
250.00	3997.00	0.9500	33.379
250.00	2997.00	0.9500	24.27
250.00	1992.00	0.9500	15.655
250.00	998.00	0.9500	7.617
260.00	19685.00	0.9500	184.36
260.01	19008.00	0.9500	179.27
260.01	18018.00	0.9500	171.413
260.00	17017.00	0.9500	162.926
260.01	16008.00	0.9500	153.819
260.01	15015.00	0.9500	144.337
260.01	14014.00	0.9500	134.298
260.01	13009.00	0.9500	123.82
260.01	12003.00	0.9500	113.023
260.01	11008.00	0.9500	102.188
260.00	10005.00	0.9500	91.25
260.01	9000.00	0.9500	80.421
260.00	8013.00	0.9500	70.021
260.00	7006.00	0.9500	59.75
260.00	6004.00	0.9500	49.933
260.00	4999.00	0.9500	40.507
260.00	3997.00	0.9500	31.566
260.00	2998.00	0.9500	23.076
260.00	1997.00	0.9500	14.985
260.00	997.00	0.9500	7.297
240.04	19625.00	0.8999	194.079
240.04	19012.00	0.8999	189.597
240.04	18027.00	0.8999	181.952
240.04	17027.00	0.8999	173.595
240.04	16029.00	0.8999	164.619
240.05	15022.00	0.8999	154.9
240.04	14021.00	0.8999	144.595
240.05	13019.00	0.8999	133.681
240.04	12005.00	0.8999	122.134
240.04	11012.00	0.8999	110.482
240.05	10006.00	0.8999	98.519
240.05	9009.00	0.8999	86.73
240.04	8002.00	0.8999	75.062
240.04	7001.00	0.8999	63.844
240.05	6000.00	0.8999	53.119
240.05	4998.00	0.8999	42.934
240.05	3998.00	0.8999	33.318
240.05	2998.00	0.8999	24.247
240.05	1996.00	0.8999	15.681
240.05	998.00	0.8999	7.62
250.00	18875.00	0.8999	173.914
250.00	18031.00	0.8999	167.361
250.00	17022.00	0.8999	159.082
250.00	16006.00	0.8999	150.232
250.00	15019.00	0.8999	141.163
250.00	14018.00	0.8999	131.51
250.00	13000.00	0.8999	121.315
250.00	12003.00	0.8999	111.033
250.01	11009.00	0.8999	100.603
250.00	10008.00	0.8999	90.05
250.00	9003.00	0.8999	79.524
250.00	8002.00	0.8999	69.239
250.01	7001.00	0.8999	59.226
250.01	6000.00	0.8999	49.568
250.01	4998.00	0.8999	40.29
250.00	3997.00	0.8999	31.436
250.00	2997.00	0.8999	22.993
250.01	1998.00	0.8999	14.96
250.00	997.00	0.8999	7.285
260.01	19940.00	0.8999	168.802
260.01	19031.00	0.8999	162.3
260.01	18020.00	0.8999	154.7
260.01	17010.00	0.8999	146.708
260.01	16023.00	0.8999	138.537
260.01	15018.00	0.8999	129.866
260.01	14018.00	0.8999	120.922
260.01	13014.00	0.8999	111.695
260.01	12010.00	0.8999	102.273
260.01	11007.00	0.8999	92.773
260.01	10003.00	0.8999	83.236
260.01	9003.00	0.8999	73.809
260.01	8001.00	0.8999	64.503
260.01	7000.00	0.8999	55.42
260.01	5998.00	0.8999	46.581
260.01	5001.00	0.8999	38.068
260.01	4000.00	0.8999	29.826
260.01	2998.00	0.8999	21.898
260.01	1998.00	0.8999	14.29
260.01	997.00	0.8999	6.987
240.03	16089.00	0.4926	77.505
240.03	15008.00	0.4926	72.695
240.03	14007.00	0.4926	68.168
240.03	13007.00	0.4926	63.573
240.03	11997.00	0.4926	58.869
240.03	11002.00	0.4926	54.18
240.03	10001.00	0.4926	49.403
240.03	9001.00	0.4926	44.581
240.03	8000.00	0.4926	39.712
240.03	6999.00	0.4926	34.803
240.03	5997.00	0.4926	29.862
240.03	4998.00	0.4926	24.905
240.03	3998.00	0.4926	19.928
240.03	2998.00	0.4926	14.943
240.03	1992.00	0.4926	9.928
240.03	997.00	0.4926	4.969
250.00	19686.00	0.4926	88.663
249.96	18997.00	0.4926	85.915
250.02	18002.00	0.4926	81.885
249.99	16646.00	0.4926	76.317
250.00	15999.00	0.4926	73.6
249.99	15003.00	0.4926	69.361
250.00	14005.00	0.4926	65.051
250.00	12999.00	0.4926	60.647
250.00	12002.00	0.4926	56.224
250.00	11000.00	0.4926	51.722
250.00	10006.00	0.4926	47.205
250.00	8999.00	0.4926	42.584
250.00	8001.00	0.4926	37.957
250.05	7001.00	0.4926	33.286
250.00	6000.00	0.4926	28.574
249.99	4945.00	0.4926	23.6
249.99	3997.00	0.4926	19.095
249.99	2997.00	0.4926	14.323
249.99	1991.00	0.4926	9.521
249.99	997.00	0.4926	4.769
259.99	19334.00	0.4926	83.513
259.99	19000.00	0.4926	82.229
259.99	18001.00	0.4926	78.346
259.99	17011.00	0.4926	74.435
259.99	16009.00	0.4926	70.413
259.99	15001.00	0.4926	66.31
259.99	14000.00	0.4926	62.178
259.99	12960.00	0.4926	57.824
259.99	11996.00	0.4926	53.738
259.99	10997.00	0.4926	49.455
259.99	9998.00	0.4926	45.124
259.99	9000.00	0.4926	40.749
260.00	7999.00	0.4926	36.324
260.00	6996.00	0.4926	31.852
259.99	5997.00	0.4926	27.365
260.00	4997.00	0.4926	22.844
260.00	3997.00	0.4926	18.303
260.00	2997.00	0.4926	13.742
260.00	1997.00	0.4926	9.169
260.00	997.00	0.4926	4.578
275.09	19880.00	0.4926	80.485
275.10	18991.00	0.4926	77.268
274.97	17996.00	0.4926	73.619
275.03	16993.00	0.4926	69.886
275.01	16003.00	0.4926	66.148
275.14	14998.00	0.4926	62.299
275.03	13992.00	0.4926	58.399
274.98	12333.00	0.4926	51.873
274.98	11998.00	0.4926	50.535
274.98	10998.00	0.4926	46.513
274.98	9997.00	0.4926	42.44
274.98	8996.00	0.4926	38.323
274.99	7996.00	0.4926	34.172
274.98	6996.00	0.4926	29.987
274.98	5997.00	0.4926	25.777
274.98	4997.00	0.4926	21.529
274.98	3997.00	0.4926	17.256
274.98	2997.00	0.4926	12.967
274.98	1997.00	0.4926	8.655
274.98	997.00	0.4926	4.329
300.00	19872.00	0.4926	73.326
299.94	18984.00	0.4926	70.381
300.05	17984.00	0.4926	67.021
299.89	16990.00	0.4926	63.637
299.91	15304.00	0.4926	57.804
299.91	14990.00	0.4926	56.703
299.91	13998.00	0.4926	53.196
299.91	12994.00	0.4926	49.608
299.91	11994.00	0.4926	45.991
299.91	10999.00	0.4926	42.355
299.91	9994.00	0.4926	38.64
299.91	8995.00	0.4926	34.912
299.91	7998.00	0.4926	31.158
299.91	6997.00	0.4926	27.355
299.91	5995.00	0.4926	23.517
299.91	4996.00	0.4926	19.658
299.91	3996.00	0.4926	15.769
299.91	2997.00	0.4926	11.86
299.91	1997.00	0.4926	7.922
299.91	997.00	0.4926	3.963
325.14	19910.00	0.4926	67.575
325.05	18996.00	0.4926	64.771
325.26	17996.00	0.4926	61.669
325.18	16993.00	0.4926	58.519
324.92	15482.00	0.4926	53.698
324.92	14996.00	0.4926	52.129
324.92	13989.00	0.4926	48.856
324.92	12990.00	0.4926	45.572
324.92	11991.00	0.4926	42.251
324.92	10989.00	0.4926	38.891
324.92	9995.00	0.4926	35.519
324.92	8996.00	0.4926	32.1
324.92	7994.00	0.4926	28.637
324.92	6995.00	0.4926	25.153
324.92	5996.00	0.4926	21.639
324.92	4996.00	0.4926	18.094
324.92	3995.00	0.4926	14.517
324.92	2996.00	0.4926	10.922
324.92	1997.00	0.4926	7.302
324.92	997.00	0.4926	3.654
349.91	16463.00	0.4926	52.66
349.92	15995.00	0.4926	51.273
349.91	14995.00	0.4926	48.291
349.91	13986.00	0.4926	45.249
349.92	12995.00	0.4926	42.23
349.91	11987.00	0.4926	39.127
349.92	10991.00	0.4926	36.033
349.92	9989.00	0.4926	32.885
349.91	8995.00	0.4926	29.735
349.91	7997.00	0.4926	26.543
349.91	6991.00	0.4926	23.297
349.91	5993.00	0.4926	20.048
349.91	4995.00	0.4926	16.77
349.91	3996.00	0.4926	13.462
349.91	2996.00	0.4926	10.13
349.91	1989.00	0.4926	6.742
349.91	997.00	0.4926	3.39
374.90	14969.00	0.4926	44.946
374.91	13428.00	0.4926	40.599
374.90	12989.00	0.4926	39.345
374.91	11988.00	0.4926	36.471
374.91	10992.00	0.4926	33.585
374.91	9992.00	0.4926	30.659
374.90	8993.00	0.4926	27.711
374.90	7993.00	0.4926	24.728
374.90	6993.00	0.4926	21.725
374.90	5995.00	0.4926	18.697
374.91	4995.00	0.4926	15.636
374.90	3996.00	0.4926	12.555
374.91	2996.00	0.4926	9.447
374.91	1997.00	0.4926	6.319
374.90	997.00	0.4926	3.165
399.99	15369.00	0.4926	43.172
399.99	14974.00	0.4926	42.136
399.99	13984.00	0.4926	39.52
399.99	12978.00	0.4926	36.835
399.99	11984.00	0.4926	34.161
399.99	10983.00	0.4926	31.443
399.99	9992.00	0.4926	28.726
399.99	8991.00	0.4926	25.954
399.99	7990.00	0.4926	23.158
399.99	6972.00	0.4926	20.293
399.99	5992.00	0.4926	17.506
399.99	4993.00	0.4926	14.646
399.99	3996.00	0.4926	11.762
399.99	2996.00	0.4926	8.853
399.99	1993.00	0.4926	5.91
399.99	997.00	0.4926	2.964

Mass density, kg/m3 [ref]

Fixed			Measured
Temperature, K - Gas	Pressure, kPa - Gas	Mole fraction of Methane (2) - Gas	Mass density, kg/m3 - Gas
250.03	19568.00	0.9500	198.473
250.03	19042.00	0.9500	194.564
250.03	18043.00	0.9500	186.653
250.03	17044.00	0.9500	178.081
250.03	16039.00	0.9500	168.759
250.03	15012.00	0.9500	158.475
250.03	14031.00	0.9500	147.94
250.03	13018.00	0.9500	136.433
250.04	12014.00	0.9500	124.477
250.04	11028.00	0.9500	112.43
250.04	10020.00	0.9500	99.991
250.04	9010.00	0.9500	87.651
250.04	8002.00	0.9500	75.657
250.04	7002.00	0.9500	64.244
250.04	6001.00	0.9500	53.364
250.04	4999.00	0.9500	43.071
250.04	3998.00	0.9500	33.382
250.04	2998.00	0.9500	24.279
250.03	1991.00	0.9500	15.651
250.04	998.00	0.9500	7.621
275.01	19598.00	0.9500	164.546
275.01	19027.00	0.9500	160.36
275.01	18027.00	0.9500	152.751
275.01	17024.00	0.9500	144.735
275.01	16005.00	0.9500	136.235
275.01	15019.00	0.9500	127.693
275.00	13990.00	0.9500	118.505
275.00	13015.00	0.9500	109.579
275.00	12010.00	0.9500	100.248
275.00	11003.00	0.9500	90.832
275.00	10007.00	0.9500	81.538
275.00	9005.00	0.9500	72.274
275.00	7999.00	0.9500	63.141
275.00	6999.00	0.9500	54.27
275.00	5998.00	0.9500	45.638
275.00	4999.00	0.9500	37.306
275.00	3998.00	0.9500	29.247
275.00	2997.00	0.9500	21.492
275.00	1997.00	0.9500	14.036
275.00	997.00	0.9500	6.868
299.96	19947.00	0.9500	142.569
299.96	19019.00	0.9500	136.456
299.96	18012.00	0.9500	129.617
299.96	17014.00	0.9500	122.639
299.96	16012.00	0.9500	115.449
299.96	15009.00	0.9500	108.1
299.96	14009.00	0.9500	100.634
299.96	13003.00	0.9500	93.029
299.96	12004.00	0.9500	85.416
299.96	11004.00	0.9500	77.78
299.96	10001.00	0.9500	70.115
299.96	9001.00	0.9500	62.524
299.96	8000.00	0.9500	55.004
299.96	6998.00	0.9500	47.579
299.96	5998.00	0.9500	40.294
299.96	5008.00	0.9500	33.227
299.95	4021.00	0.9500	26.333
299.96	2999.00	0.9500	19.372
299.96	2002.00	0.9500	12.753
299.96	997.00	0.9500	6.264
324.95	19715.00	0.9500	123.531
324.95	19000.00	0.9500	119.317
324.95	18002.00	0.9500	113.32
324.95	17003.00	0.9500	107.193
324.96	15998.00	0.9500	100.92
324.96	15005.00	0.9500	94.63
324.96	14000.00	0.9500	88.182
324.96	12999.00	0.9500	81.698
324.95	12000.00	0.9500	75.193
324.96	10998.00	0.9500	68.639
324.95	10002.00	0.9500	62.122
324.95	8999.00	0.9500	55.577
324.95	8000.00	0.9500	49.095
324.95	6996.00	0.9500	42.63
324.95	5997.00	0.9500	36.261
324.95	4997.00	0.9500	29.964
324.95	3996.00	0.9500	23.752
324.96	2997.00	0.9500	17.648
324.96	1991.00	0.9500	11.608
324.95	997.00	0.9500	5.755
349.94	19941.00	0.9500	111.598
349.94	19004.00	0.9500	106.652
349.94	17994.00	0.9500	101.235
349.94	16998.00	0.9500	95.804
349.94	15998.00	0.9500	90.27
349.94	14995.00	0.9500	84.662
349.94	13996.00	0.9500	79.008
349.94	12990.00	0.9500	73.276
349.94	11994.00	0.9500	67.563
349.94	10993.00	0.9500	61.799
349.94	9999.00	0.9500	56.06
349.94	9000.00	0.9500	50.297
349.94	7997.00	0.9500	44.519
349.94	6996.00	0.9500	38.775
349.94	5996.00	0.9500	33.066
349.94	4995.00	0.9500	27.399
349.94	3997.00	0.9500	21.795
349.94	2997.00	0.9500	16.237
349.94	1989.00	0.9500	10.705
349.94	997.00	0.9500	5.331
374.93	19944.00	0.9500	101.307
374.92	18996.00	0.9500	96.766
374.92	17973.00	0.9500	91.8
374.93	16992.00	0.9500	86.972
374.92	15983.00	0.9500	81.95
374.92	14981.00	0.9500	76.903
374.92	13990.00	0.9500	71.871
374.92	12991.00	0.9500	66.756
374.93	11991.00	0.9500	61.606
374.93	10985.00	0.9500	56.398
374.93	9988.00	0.9500	51.222
374.93	8990.00	0.9500	46.028
374.93	7989.00	0.9500	40.819
374.93	6995.00	0.9500	35.65
374.93	5994.00	0.9500	30.458
374.93	4995.00	0.9500	25.296
374.93	3996.00	0.9500	20.159
374.93	2998.00	0.9500	15.064
374.92	1985.00	0.9500	9.932
374.92	997.00	0.9500	4.962
400.00	19908.00	0.9500	92.835
400.00	18968.00	0.9500	88.715
400.00	17980.00	0.9500	84.322
400.00	16970.00	0.9500	79.783
400.00	15982.00	0.9500	75.296
400.00	14971.00	0.9500	70.659
400.00	13973.00	0.9500	66.035
400.00	12972.00	0.9500	61.369
400.00	11976.00	0.9500	56.692
400.00	10988.00	0.9500	52.036
400.00	9990.00	0.9500	47.301
400.00	8986.00	0.9500	42.531
400.00	7987.00	0.9500	37.772
400.00	6992.00	0.9500	33.027
400.00	5994.00	0.9500	28.272
400.00	4996.00	0.9500	23.52
400.00	3996.00	0.9500	18.766
400.00	2996.00	0.9500	14.035
400.00	1988.00	0.9500	9.288
400.00	997.00	0.9500	4.638
250.03	19935.00	0.8999	181.673
250.03	19046.00	0.8999	175.211
250.03	18041.00	0.8999	167.461
250.03	17031.00	0.8999	159.171
250.02	16033.00	0.8999	150.497
250.02	15029.00	0.8999	141.278
250.02	14024.00	0.8999	131.6
250.02	13025.00	0.8999	121.592
250.02	12015.00	0.8999	111.18
250.02	11015.00	0.8999	100.697
250.02	10007.00	0.8999	90.057
250.02	9008.00	0.8999	79.589
250.02	8001.00	0.8999	69.241
250.02	7001.00	0.8999	59.241
250.02	6000.00	0.8999	49.577
250.02	4999.00	0.8999	40.31
250.02	4002.00	0.8999	31.484
250.02	3000.00	0.8999	23.024
250.02	2000.00	0.8999	14.974
250.02	998.00	0.8999	7.291
275.00	18804.00	0.8999	144.712
275.00	18024.00	0.8999	139.174
275.00	17008.00	0.8999	131.721
275.00	16019.00	0.8999	124.219
275.00	15016.00	0.8999	116.391
275.00	14013.00	0.8999	108.363
275.00	13002.00	0.8999	100.126
274.99	12009.00	0.8999	91.938
274.99	11018.00	0.8999	83.711
274.99	10003.00	0.8999	75.27
274.99	8999.00	0.8999	66.981
274.99	8002.00	0.8999	58.832
274.99	6999.00	0.8999	50.769
274.99	5998.00	0.8999	42.884
274.99	4997.00	0.8999	35.184
274.99	3997.00	0.8999	27.702
274.99	2997.00	0.8999	20.437
274.99	1991.00	0.8999	13.357
274.99	998.00	0.8999	6.585
299.95	19681.00	0.8999	130.063
299.95	19009.00	0.8999	125.943
299.95	18016.00	0.8999	119.734
299.95	17022.00	0.8999	113.365
299.95	16006.00	0.8999	106.706
299.95	15003.00	0.8999	100.01
299.95	13987.00	0.8999	93.126
299.95	13009.00	0.8999	86.415
299.95	12007.00	0.8999	79.484
299.95	11000.00	0.8999	72.492
299.95	9995.00	0.8999	65.501
299.95	9002.00	0.8999	58.607
299.95	7997.00	0.8999	51.678
299.95	7000.00	0.8999	44.863
299.95	5998.00	0.8999	38.093
299.95	4998.00	0.8999	31.436
299.95	3997.00	0.8999	24.884
299.95	2997.00	0.8999	18.458
299.95	1989.00	0.8999	12.112
299.95	997.00	0.8999	6.006
324.96	19926.00	0.8999	116.277
324.96	19015.00	0.8999	111.31
324.96	18005.00	0.8999	105.694
324.96	17002.00	0.8999	100.013
324.96	15999.00	0.8999	94.246
324.96	14998.00	0.8999	88.403
324.96	14003.00	0.8999	82.534
324.96	13003.00	0.8999	76.57
324.96	12000.00	0.8999	70.552
324.96	10999.00	0.8999	64.52
324.96	9998.00	0.8999	58.468
324.96	8995.00	0.8999	52.405
324.96	7994.00	0.8999	46.366
324.96	6998.00	0.8999	40.385
324.96	5996.00	0.8999	34.403
324.96	4997.00	0.8999	28.498
324.96	3997.00	0.8999	22.64
324.96	2998.00	0.8999	16.862
324.96	1997.00	0.8999	11.149
324.96	997.00	0.8999	5.523
349.94	19921.00	0.8999	104.6
349.94	18995.00	0.8999	100.043
349.94	17984.00	0.8999	94.992
349.94	16992.00	0.8999	89.961
349.94	15993.00	0.8999	84.83
349.94	15003.00	0.8999	79.68
349.94	13990.00	0.8999	74.36
349.94	12999.00	0.8999	69.108
349.94	11988.00	0.8999	63.714
349.94	10989.00	0.8999	58.36
349.94	9989.00	0.8999	52.977
349.94	8992.00	0.8999	47.601
349.94	7995.00	0.8999	42.22
349.94	6993.00	0.8999	36.826
349.94	5995.00	0.8999	31.461
349.94	4996.00	0.8999	26.119
349.94	3995.00	0.8999	20.798
349.94	2997.00	0.8999	15.529
349.94	1989.00	0.8999	10.253
349.94	997.00	0.8999	5.112
374.92	19912.00	0.8999	95.374
374.92	18997.00	0.8999	91.271
374.92	17991.00	0.8999	86.7
374.92	16856.00	0.8999	81.471
374.92	15992.00	0.8999	77.441
374.92	14990.00	0.8999	72.73
374.92	13966.00	0.8999	67.866
374.92	12998.00	0.8999	63.225
374.92	11986.00	0.8999	58.341
374.92	10989.00	0.8999	53.503
374.93	9991.00	0.8999	48.64
374.92	8994.00	0.8999	43.761
374.92	7988.00	0.8999	38.828
374.92	6992.00	0.8999	33.941
374.92	5995.00	0.8999	29.05
374.92	4996.00	0.8999	24.159
374.92	3993.00	0.8999	19.262
374.92	2996.00	0.8999	14.413
374.92	1997.00	0.8999	9.577
374.92	997.00	0.8999	4.766
400.00	19812.00	0.8999	87.449
400.00	18956.00	0.8999	83.913
400.00	17982.00	0.8999	79.843
400.01	16970.00	0.8999	75.567
400.00	15958.00	0.8999	71.246
400.00	14977.00	0.8999	67.013
400.01	13983.00	0.8999	62.689
400.01	12965.00	0.8999	58.225
400.01	11979.00	0.8999	53.869
400.01	10985.00	0.8999	49.453
400.01	9991.00	0.8999	45.009
400.01	8984.00	0.8999	40.487
400.01	7987.00	0.8999	35.996
400.00	6994.00	0.8999	31.514
400.01	5990.00	0.8999	26.977
400.01	4993.00	0.8999	22.465
400.01	3997.00	0.8999	17.962
400.01	2996.00	0.8999	13.446
400.01	1996.00	0.8999	8.941
400.00	997.00	0.8999	4.458

Mass density, kg/m3 [ref]

Fixed			Measured
Temperature, K - Gas	Pressure, kPa - Gas	Mole fraction of Methane (2) - Gas	Mass density, kg/m3 - Gas
240.04	19915.00	0.9500	217.591
240.05	19037.00	0.9500	211.432
240.05	18026.00	0.9500	203.713
240.05	17023.00	0.9500	195.305
240.05	16022.00	0.9500	186.059
240.05	15023.00	0.9500	175.881
240.05	14013.00	0.9500	164.584
240.05	13016.00	0.9500	152.406
240.05	12015.00	0.9500	139.257
240.05	11009.00	0.9500	125.326
240.05	10010.00	0.9500	111.115
240.04	9003.00	0.9500	96.823
240.04	8003.00	0.9500	83.039
240.05	7001.00	0.9500	69.896
240.05	6000.00	0.9500	57.586
240.05	4999.00	0.9500	46.133
240.05	3998.00	0.9500	35.506
240.05	2998.00	0.9500	25.657
240.05	1998.00	0.9500	16.504
240.05	998.00	0.9500	7.97
250.00	19784.00	0.9500	200.072
250.00	19016.00	0.9500	194.396
250.00	18017.00	0.9500	186.477
250.00	17019.00	0.9500	177.898
250.00	16011.00	0.9500	168.529
249.99	15017.00	0.9500	158.56
249.99	14013.00	0.9500	147.789
249.99	13013.00	0.9500	136.403
249.99	12011.00	0.9500	124.468
249.99	11003.00	0.9500	112.149
249.99	10007.00	0.9500	99.845
249.99	9004.00	0.9500	87.584
249.99	8002.00	0.9500	75.669
249.99	7000.00	0.9500	64.219
249.99	5997.00	0.9500	53.324
250.00	4998.00	0.9500	43.065
250.00	3997.00	0.9500	33.379
250.00	2997.00	0.9500	24.27
250.00	1992.00	0.9500	15.655
250.00	998.00	0.9500	7.617
260.00	19685.00	0.9500	184.36
260.01	19008.00	0.9500	179.27
260.01	18018.00	0.9500	171.413
260.00	17017.00	0.9500	162.926
260.01	16008.00	0.9500	153.819
260.01	15015.00	0.9500	144.337
260.01	14014.00	0.9500	134.298
260.01	13009.00	0.9500	123.82
260.01	12003.00	0.9500	113.023
260.01	11008.00	0.9500	102.188
260.00	10005.00	0.9500	91.25
260.01	9000.00	0.9500	80.421
260.00	8013.00	0.9500	70.021
260.00	7006.00	0.9500	59.75
260.00	6004.00	0.9500	49.933
260.00	4999.00	0.9500	40.507
260.00	3997.00	0.9500	31.566
260.00	2998.00	0.9500	23.076
260.00	1997.00	0.9500	14.985
260.00	997.00	0.9500	7.297
240.04	19625.00	0.8999	194.079
240.04	19012.00	0.8999	189.597
240.04	18027.00	0.8999	181.952
240.04	17027.00	0.8999	173.595
240.04	16029.00	0.8999	164.619
240.05	15022.00	0.8999	154.9
240.04	14021.00	0.8999	144.595
240.05	13019.00	0.8999	133.681
240.04	12005.00	0.8999	122.134
240.04	11012.00	0.8999	110.482
240.05	10006.00	0.8999	98.519
240.05	9009.00	0.8999	86.73
240.04	8002.00	0.8999	75.062
240.04	7001.00	0.8999	63.844
240.05	6000.00	0.8999	53.119
240.05	4998.00	0.8999	42.934
240.05	3998.00	0.8999	33.318
240.05	2998.00	0.8999	24.247
240.05	1996.00	0.8999	15.681
240.05	998.00	0.8999	7.62
250.00	18875.00	0.8999	173.914
250.00	18031.00	0.8999	167.361
250.00	17022.00	0.8999	159.082
250.00	16006.00	0.8999	150.232
250.00	15019.00	0.8999	141.163
250.00	14018.00	0.8999	131.51
250.00	13000.00	0.8999	121.315
250.00	12003.00	0.8999	111.033
250.01	11009.00	0.8999	100.603
250.00	10008.00	0.8999	90.05
250.00	9003.00	0.8999	79.524
250.00	8002.00	0.8999	69.239
250.01	7001.00	0.8999	59.226
250.01	6000.00	0.8999	49.568
250.01	4998.00	0.8999	40.29
250.00	3997.00	0.8999	31.436
250.00	2997.00	0.8999	22.993
250.01	1998.00	0.8999	14.96
250.00	997.00	0.8999	7.285
260.01	19940.00	0.8999	168.802
260.01	19031.00	0.8999	162.3
260.01	18020.00	0.8999	154.7
260.01	17010.00	0.8999	146.708
260.01	16023.00	0.8999	138.537
260.01	15018.00	0.8999	129.866
260.01	14018.00	0.8999	120.922
260.01	13014.00	0.8999	111.695
260.01	12010.00	0.8999	102.273
260.01	11007.00	0.8999	92.773
260.01	10003.00	0.8999	83.236
260.01	9003.00	0.8999	73.809
260.01	8001.00	0.8999	64.503
260.01	7000.00	0.8999	55.42
260.01	5998.00	0.8999	46.581
260.01	5001.00	0.8999	38.068
260.01	4000.00	0.8999	29.826
260.01	2998.00	0.8999	21.898
260.01	1998.00	0.8999	14.29
260.01	997.00	0.8999	6.987
240.03	16089.00	0.4926	77.505
240.03	15008.00	0.4926	72.695
240.03	14007.00	0.4926	68.168
240.03	13007.00	0.4926	63.573
240.03	11997.00	0.4926	58.869
240.03	11002.00	0.4926	54.18
240.03	10001.00	0.4926	49.403
240.03	9001.00	0.4926	44.581
240.03	8000.00	0.4926	39.712
240.03	6999.00	0.4926	34.803
240.03	5997.00	0.4926	29.862
240.03	4998.00	0.4926	24.905
240.03	3998.00	0.4926	19.928
240.03	2998.00	0.4926	14.943
240.03	1992.00	0.4926	9.928
240.03	997.00	0.4926	4.969
250.00	19686.00	0.4926	88.663
249.96	18997.00	0.4926	85.915
250.02	18002.00	0.4926	81.885
249.99	16646.00	0.4926	76.317
250.00	15999.00	0.4926	73.6
249.99	15003.00	0.4926	69.361
250.00	14005.00	0.4926	65.051
250.00	12999.00	0.4926	60.647
250.00	12002.00	0.4926	56.224
250.00	11000.00	0.4926	51.722
250.00	10006.00	0.4926	47.205
250.00	8999.00	0.4926	42.584
250.00	8001.00	0.4926	37.957
250.05	7001.00	0.4926	33.286
250.00	6000.00	0.4926	28.574
249.99	4945.00	0.4926	23.6
249.99	3997.00	0.4926	19.095
249.99	2997.00	0.4926	14.323
249.99	1991.00	0.4926	9.521
249.99	997.00	0.4926	4.769
259.99	19334.00	0.4926	83.513
259.99	19000.00	0.4926	82.229
259.99	18001.00	0.4926	78.346
259.99	17011.00	0.4926	74.435
259.99	16009.00	0.4926	70.413
259.99	15001.00	0.4926	66.31
259.99	14000.00	0.4926	62.178
259.99	12960.00	0.4926	57.824
259.99	11996.00	0.4926	53.738
259.99	10997.00	0.4926	49.455
259.99	9998.00	0.4926	45.124
259.99	9000.00	0.4926	40.749
260.00	7999.00	0.4926	36.324
260.00	6996.00	0.4926	31.852
259.99	5997.00	0.4926	27.365
260.00	4997.00	0.4926	22.844
260.00	3997.00	0.4926	18.303
260.00	2997.00	0.4926	13.742
260.00	1997.00	0.4926	9.169
260.00	997.00	0.4926	4.578
275.09	19880.00	0.4926	80.485
275.10	18991.00	0.4926	77.268
274.97	17996.00	0.4926	73.619
275.03	16993.00	0.4926	69.886
275.01	16003.00	0.4926	66.148
275.14	14998.00	0.4926	62.299
275.03	13992.00	0.4926	58.399
274.98	12333.00	0.4926	51.873
274.98	11998.00	0.4926	50.535
274.98	10998.00	0.4926	46.513
274.98	9997.00	0.4926	42.44
274.98	8996.00	0.4926	38.323
274.99	7996.00	0.4926	34.172
274.98	6996.00	0.4926	29.987
274.98	5997.00	0.4926	25.777
274.98	4997.00	0.4926	21.529
274.98	3997.00	0.4926	17.256
274.98	2997.00	0.4926	12.967
274.98	1997.00	0.4926	8.655
274.98	997.00	0.4926	4.329
300.00	19872.00	0.4926	73.326
299.94	18984.00	0.4926	70.381
300.05	17984.00	0.4926	67.021
299.89	16990.00	0.4926	63.637
299.91	15304.00	0.4926	57.804
299.91	14990.00	0.4926	56.703
299.91	13998.00	0.4926	53.196
299.91	12994.00	0.4926	49.608
299.91	11994.00	0.4926	45.991
299.91	10999.00	0.4926	42.355
299.91	9994.00	0.4926	38.64
299.91	8995.00	0.4926	34.912
299.91	7998.00	0.4926	31.158
299.91	6997.00	0.4926	27.355
299.91	5995.00	0.4926	23.517
299.91	4996.00	0.4926	19.658
299.91	3996.00	0.4926	15.769
299.91	2997.00	0.4926	11.86
299.91	1997.00	0.4926	7.922
299.91	997.00	0.4926	3.963
325.14	19910.00	0.4926	67.575
325.05	18996.00	0.4926	64.771
325.26	17996.00	0.4926	61.669
325.18	16993.00	0.4926	58.519
324.92	15482.00	0.4926	53.698
324.92	14996.00	0.4926	52.129
324.92	13989.00	0.4926	48.856
324.92	12990.00	0.4926	45.572
324.92	11991.00	0.4926	42.251
324.92	10989.00	0.4926	38.891
324.92	9995.00	0.4926	35.519
324.92	8996.00	0.4926	32.1
324.92	7994.00	0.4926	28.637
324.92	6995.00	0.4926	25.153
324.92	5996.00	0.4926	21.639
324.92	4996.00	0.4926	18.094
324.92	3995.00	0.4926	14.517
324.92	2996.00	0.4926	10.922
324.92	1997.00	0.4926	7.302
324.92	997.00	0.4926	3.654
349.91	16463.00	0.4926	52.66
349.92	15995.00	0.4926	51.273
349.91	14995.00	0.4926	48.291
349.91	13986.00	0.4926	45.249
349.92	12995.00	0.4926	42.23
349.91	11987.00	0.4926	39.127
349.92	10991.00	0.4926	36.033
349.92	9989.00	0.4926	32.885
349.91	8995.00	0.4926	29.735
349.91	7997.00	0.4926	26.543
349.91	6991.00	0.4926	23.297
349.91	5993.00	0.4926	20.048
349.91	4995.00	0.4926	16.77
349.91	3996.00	0.4926	13.462
349.91	2996.00	0.4926	10.13
349.91	1989.00	0.4926	6.742
349.91	997.00	0.4926	3.39
374.90	14969.00	0.4926	44.946
374.91	13428.00	0.4926	40.599
374.90	12989.00	0.4926	39.345
374.91	11988.00	0.4926	36.471
374.91	10992.00	0.4926	33.585
374.91	9992.00	0.4926	30.659
374.90	8993.00	0.4926	27.711
374.90	7993.00	0.4926	24.728
374.90	6993.00	0.4926	21.725
374.90	5995.00	0.4926	18.697
374.91	4995.00	0.4926	15.636
374.90	3996.00	0.4926	12.555
374.91	2996.00	0.4926	9.447
374.91	1997.00	0.4926	6.319
374.90	997.00	0.4926	3.165
399.99	15369.00	0.4926	43.172
399.99	14974.00	0.4926	42.136
399.99	13984.00	0.4926	39.52
399.99	12978.00	0.4926	36.835
399.99	11984.00	0.4926	34.161
399.99	10983.00	0.4926	31.443
399.99	9992.00	0.4926	28.726
399.99	8991.00	0.4926	25.954
399.99	7990.00	0.4926	23.158
399.99	6972.00	0.4926	20.293
399.99	5992.00	0.4926	17.506
399.99	4993.00	0.4926	14.646
399.99	3996.00	0.4926	11.762
399.99	2996.00	0.4926	8.853
399.99	1993.00	0.4926	5.91
399.99	997.00	0.4926	2.964

Speed of sound, m/s [ref]

Operational condition: Frequency, MHz = 0.002 (Gas)

Fixed			Measured
Mole fraction of Methane (2) - Gas	Temperature, K - Gas	Pressure, kPa - Gas	Speed of sound, m/s - Gas
0.9500	273.16	495.33	438.872
0.9500	273.16	1010.24	437.114
0.9500	273.16	2010.57	433.899
0.9500	273.16	2988.84	431.215
0.9500	273.16	4423.28	428.279
0.9500	273.16	5984.10	426.789
0.9500	273.16	6475.85	426.753
0.9500	273.16	6972.39	426.958
0.9500	273.16	7524.33	427.475
0.9500	273.16	8589.46	429.444
0.9500	273.16	9523.81	432.263
0.9500	273.16	10523.48	436.501
0.9500	273.16	11506.05	441.941
0.9500	273.16	12532.37	449.01
0.9500	273.16	13316.89	455.316
0.9500	273.16	14040.39	461.811
0.9500	273.16	14722.31	468.484
0.9500	273.16	15299.18	474.531
0.9500	273.16	15853.21	480.648
0.9500	273.16	16515.90	488.342
0.9500	273.16	17032.23	494.578
0.9500	273.16	17532.63	500.832
0.9500	273.16	18009.23	506.918
0.9500	273.16	18551.86	514.011
0.9500	273.16	19088.31	521.156
0.9500	273.16	19870.71	531.762
0.9500	300.00	483.64	458.745
0.9500	300.00	985.69	457.694
0.9500	300.00	1995.98	455.802
0.9500	300.00	3212.73	454.098
0.9500	300.00	4475.17	453.091
0.9500	300.00	5513.26	452.955
0.9500	300.00	6460.78	453.379
0.9500	300.00	7011.85	453.899
0.9500	300.00	7542.96	454.596
0.9500	300.00	8430.77	456.229
0.9500	300.00	9344.19	458.509
0.9500	300.00	10533.54	462.721
0.9500	300.00	11499.83	466.769
0.9500	300.00	12506.69	471.789
0.9500	300.00	13305.29	476.352
0.9500	300.00	13998.31	480.716
0.9500	300.00	14698.91	485.507
0.9500	300.00	15301.86	489.916
0.9500	300.00	15901.60	494.558
0.9500	300.00	16491.04	499.36
0.9500	300.00	17004.62	503.74
0.9500	300.00	17524.99	508.329
0.9500	300.00	18012.63	512.777
0.9500	300.00	18514.84	517.493
0.9500	300.00	19010.97	522.29
0.9500	300.00	19447.13	526.603
0.9500	325.00	479.57	476.043
0.9500	325.00	979.32	475.453
0.9500	325.00	1677.36	474.762
0.9500	325.00	2455.46	474.189
0.9500	325.00	3481.42	473.831
0.9500	325.00	4486.07	473.854
0.9500	325.00	5510.15	474.344
0.9500	325.00	6498.07	475.287
0.9500	325.00	7001.28	475.958
0.9500	325.00	7498.52	476.746
0.9500	325.00	8512.46	478.751
0.9500	325.00	9503.90	481.247
0.9500	325.00	10501.73	484.313
0.9500	325.00	11469.17	487.817
0.9500	325.00	12516.99	492.249
0.9500	325.00	13295.03	495.908
0.9500	325.00	14011.07	499.577
0.9500	325.00	14716.21	503.462
0.9500	325.00	15308.60	506.936
0.9500	325.00	16002.60	511.232
0.9500	325.00	16552.19	514.814
0.9500	325.00	17002.00	517.854
0.9500	325.00	17513.14	521.429
0.9500	325.00	17960.77	524.657
0.9500	325.00	18520.73	528.846
0.9500	325.00	19024.48	532.708
0.9500	325.00	19536.17	536.749
0.9500	350.00	476.77	491.904
0.9500	350.00	985.81	491.679
0.9500	350.00	1988.48	491.412
0.9500	350.00	3557.71	491.722
0.9500	350.00	5005.45	492.679
0.9500	350.00	6520.87	494.522
0.9500	350.00	8537.32	498.362
0.9500	350.00	10534.33	503.83
0.9500	350.00	12031.82	509.021
0.9500	350.00	13418.11	514.869
0.9500	350.00	14519.42	519.931
0.9500	350.00	15599.13	525.36
0.9500	350.00	16625.92	530.933
0.9500	350.00	17511.64	536.049
0.9500	350.00	18437.31	541.708
0.9500	350.00	19236.98	546.808
0.9500	350.00	20020.05	551.995
0.9500	350.00	20965.89	558.461
0.9500	375.00	508.08	506.893
0.9500	375.00	970.30	506.945
0.9500	375.00	1994.94	507.226
0.9500	375.00	3486.11	508.112
0.9500	375.00	4994.34	509.679
0.9500	375.00	6507.40	511.941
0.9500	375.00	8534.51	516.241
0.9500	375.00	10526.41	521.645
0.9500	375.00	12040.93	526.636
0.9500	375.00	13432.39	531.867
0.9500	375.00	14509.69	536.352
0.9500	375.00	15609.39	541.303
0.9500	375.00	16573.30	545.933
0.9500	375.00	17518.13	550.715
0.9500	375.00	18321.91	555.023
0.9500	375.00	19198.12	559.901
0.8999	273.16	491.07	449.799
0.8999	273.16	993.40	448.499
0.8999	273.16	1705.33	446.82
0.8999	273.16	2484.93	445.245
0.8999	273.16	3490.42	443.67
0.8999	273.16	4498.37	442.685
0.8999	273.16	5505.71	442.375
0.8999	273.16	6493.02	442.801
0.8999	273.16	7508.09	444.067
0.8999	273.16	8481.65	446.196
0.8999	273.16	9521.13	449.338
0.8999	273.16	10522.30	453.42
0.8999	273.16	11530.33	458.538
0.8999	273.16	12637.71	465.332
0.8999	273.16	13633.37	472.451
0.8999	273.16	14536.78	479.702
0.8999	273.16	15350.91	486.78
0.8999	273.16	16041.41	493.253
0.8999	273.16	16537.03	498.116
0.8999	273.16	17048.09	503.308
0.8999	273.16	17547.76	508.548
0.8999	273.16	18059.10	514.054
0.8999	273.16	18536.62	519.322
0.8999	273.16	19116.94	525.878
0.8999	300.00	482.33	469.85
0.8999	300.00	1000.98	469.176
0.8999	300.00	1985.54	468.062
0.8999	300.00	2984.62	467.344
0.8999	300.00	4487.26	467.101
0.8999	300.00	5490.05	467.577
0.8999	300.00	6494.83	468.59
0.8999	300.00	7501.43	470.201
0.8999	300.00	9026.42	473.764
0.8999	300.00	10503.57	478.718
0.8999	300.00	11505.01	482.859
0.8999	300.00	12492.05	487.56
0.8999	300.00	13505.38	493.085
0.8999	300.00	14495.13	499.048
0.8999	300.00	15514.52	505.799
0.8999	300.00	16489.81	512.809
0.8999	300.00	16993.59	516.634
0.8999	300.00	17510.91	520.691
0.8999	300.00	18011.62	524.748
0.8999	300.00	18523.05	529.002
0.8999	300.00	19042.85	533.448
0.8999	300.00	19955.15	541.498
0.8999	325.00	473.90	486.997
0.8999	325.00	976.85	486.836
0.8999	325.00	1477.54	486.663
0.8999	325.00	2481.56	486.492
0.8999	325.00	3486.42	486.705
0.8999	325.00	4485.52	487.28
0.8999	325.00	5487.25	488.283
0.8999	325.00	6484.73	489.677
0.8999	325.00	7483.33	491.535
0.8999	325.00	8497.39	493.863
0.8999	325.00	9494.23	496.639
0.8999	325.00	10492.66	499.871
0.8999	325.00	11475.31	503.566
0.8999	325.00	12500.25	507.854
0.8999	325.00	13503.38	512.522
0.8999	325.00	14493.45	517.559
0.8999	325.00	15293.58	521.983
0.8999	325.00	15994.51	526.061
0.8999	325.00	16484.64	529.048
0.8999	325.00	16992.20	532.23
0.8999	325.00	17520.21	535.657
0.8999	325.00	17995.45	538.814
0.8999	325.00	18490.30	542.215
0.8999	325.00	18993.41	545.758
0.8999	325.00	19503.94	549.411
0.8999	325.00	19905.77	552.384
0.8999	350.00	489.40	503.045
0.8999	350.00	990.00	503.092
0.8999	350.00	1981.52	503.391
0.8999	350.00	3476.80	504.312
0.8999	350.00	4993.27	506.115
0.8999	350.00	6484.03	508.509
0.8999	350.00	7487.58	510.596
0.8999	350.00	8493.70	513.012
0.8999	350.00	9502.08	515.827
0.8999	350.00	10503.14	518.95
0.8999	350.00	11996.27	524.334
0.8999	350.00	13498.05	530.471
0.8999	350.00	14498.21	535.04
0.8999	350.00	15505.00	539.958
0.8999	350.00	16499.97	545.162
0.8999	350.00	17495.27	550.647
0.8999	350.00	18508.51	556.568
0.8999	350.00	19509.30	562.67
0.8999	350.00	20352.39	568.049
0.8999	375.00	480.89	517.606
0.8999	375.00	974.52	518.004
0.8999	375.00	1977.77	518.72
0.8999	375.00	2982.45	519.779
0.8999	375.00	4474.76	521.686
0.8999	375.00	5993.90	524.499
0.8999	375.00	7482.90	527.662
0.8999	375.00	8485.87	530.296
0.8999	375.00	9494.86	533.164
0.8999	375.00	10490.61	536.22
0.8999	375.00	11481.69	539.605
0.8999	375.00	12499.83	543.464
0.8999	375.00	13464.61	547.302
0.8999	375.00	14474.74	551.755
0.8999	375.00	15492.62	556.408
0.8999	375.00	16439.96	560.926
0.8999	375.00	17489.72	566.34
0.8999	375.00	18171.66	569.916
0.8999	375.00	18704.92	572.844

Speed of sound, m/s [ref]

Operational condition: Frequency, MHz = 0.002 (Gas)

Fixed			Measured
Mole fraction of Methane (2) - Gas	Temperature, K - Gas	Pressure, kPa - Gas	Speed of sound, m/s - Gas
0.9500	273.16	495.33	438.872
0.9500	273.16	1010.24	437.114
0.9500	273.16	2010.57	433.899
0.9500	273.16	2988.84	431.215
0.9500	273.16	4423.28	428.279
0.9500	273.16	5984.10	426.789
0.9500	273.16	6475.85	426.753
0.9500	273.16	6972.39	426.958
0.9500	273.16	7524.33	427.475
0.9500	273.16	8589.46	429.444
0.9500	273.16	9523.81	432.263
0.9500	273.16	10523.48	436.501
0.9500	273.16	11506.05	441.941
0.9500	273.16	12532.37	449.01
0.9500	273.16	13316.89	455.316
0.9500	273.16	14040.39	461.811
0.9500	273.16	14722.31	468.484
0.9500	273.16	15299.18	474.531
0.9500	273.16	15853.21	480.648
0.9500	273.16	16515.90	488.342
0.9500	273.16	17032.23	494.578
0.9500	273.16	17532.63	500.832
0.9500	273.16	18009.23	506.918
0.9500	273.16	18551.86	514.011
0.9500	273.16	19088.31	521.156
0.9500	273.16	19870.71	531.762
0.9500	300.00	483.64	458.745
0.9500	300.00	985.69	457.694
0.9500	300.00	1995.98	455.802
0.9500	300.00	3212.73	454.098
0.9500	300.00	4475.17	453.091
0.9500	300.00	5513.26	452.955
0.9500	300.00	6460.78	453.379
0.9500	300.00	7011.85	453.899
0.9500	300.00	7542.96	454.596
0.9500	300.00	8430.77	456.229
0.9500	300.00	9344.19	458.509
0.9500	300.00	10533.54	462.721
0.9500	300.00	11499.83	466.769
0.9500	300.00	12506.69	471.789
0.9500	300.00	13305.29	476.352
0.9500	300.00	13998.31	480.716
0.9500	300.00	14698.91	485.507
0.9500	300.00	15301.86	489.916
0.9500	300.00	15901.60	494.558
0.9500	300.00	16491.04	499.36
0.9500	300.00	17004.62	503.74
0.9500	300.00	17524.99	508.329
0.9500	300.00	18012.63	512.777
0.9500	300.00	18514.84	517.493
0.9500	300.00	19010.97	522.29
0.9500	300.00	19447.13	526.603
0.9500	325.00	479.57	476.043
0.9500	325.00	979.32	475.453
0.9500	325.00	1677.36	474.762
0.9500	325.00	2455.46	474.189
0.9500	325.00	3481.42	473.831
0.9500	325.00	4486.07	473.854
0.9500	325.00	5510.15	474.344
0.9500	325.00	6498.07	475.287
0.9500	325.00	7001.28	475.958
0.9500	325.00	7498.52	476.746
0.9500	325.00	8512.46	478.751
0.9500	325.00	9503.90	481.247
0.9500	325.00	10501.73	484.313
0.9500	325.00	11469.17	487.817
0.9500	325.00	12516.99	492.249
0.9500	325.00	13295.03	495.908
0.9500	325.00	14011.07	499.577
0.9500	325.00	14716.21	503.462
0.9500	325.00	15308.60	506.936
0.9500	325.00	16002.60	511.232
0.9500	325.00	16552.19	514.814
0.9500	325.00	17002.00	517.854
0.9500	325.00	17513.14	521.429
0.9500	325.00	17960.77	524.657
0.9500	325.00	18520.73	528.846
0.9500	325.00	19024.48	532.708
0.9500	325.00	19536.17	536.749
0.9500	350.00	476.77	491.904
0.9500	350.00	985.81	491.679
0.9500	350.00	1988.48	491.412
0.9500	350.00	3557.71	491.722
0.9500	350.00	5005.45	492.679
0.9500	350.00	6520.87	494.522
0.9500	350.00	8537.32	498.362
0.9500	350.00	10534.33	503.83
0.9500	350.00	12031.82	509.021
0.9500	350.00	13418.11	514.869
0.9500	350.00	14519.42	519.931
0.9500	350.00	15599.13	525.36
0.9500	350.00	16625.92	530.933
0.9500	350.00	17511.64	536.049
0.9500	350.00	18437.31	541.708
0.9500	350.00	19236.98	546.808
0.9500	350.00	20020.05	551.995
0.9500	350.00	20965.89	558.461
0.9500	375.00	508.08	506.893
0.9500	375.00	970.30	506.945
0.9500	375.00	1994.94	507.226
0.9500	375.00	3486.11	508.112
0.9500	375.00	4994.34	509.679
0.9500	375.00	6507.40	511.941
0.9500	375.00	8534.51	516.241
0.9500	375.00	10526.41	521.645
0.9500	375.00	12040.93	526.636
0.9500	375.00	13432.39	531.867
0.9500	375.00	14509.69	536.352
0.9500	375.00	15609.39	541.303
0.9500	375.00	16573.30	545.933
0.9500	375.00	17518.13	550.715
0.9500	375.00	18321.91	555.023
0.9500	375.00	19198.12	559.901
0.8999	273.16	491.07	449.799
0.8999	273.16	993.40	448.499
0.8999	273.16	1705.33	446.82
0.8999	273.16	2484.93	445.245
0.8999	273.16	3490.42	443.67
0.8999	273.16	4498.37	442.685
0.8999	273.16	5505.71	442.375
0.8999	273.16	6493.02	442.801
0.8999	273.16	7508.09	444.067
0.8999	273.16	8481.65	446.196
0.8999	273.16	9521.13	449.338
0.8999	273.16	10522.30	453.42
0.8999	273.16	11530.33	458.538
0.8999	273.16	12637.71	465.332
0.8999	273.16	13633.37	472.451
0.8999	273.16	14536.78	479.702
0.8999	273.16	15350.91	486.78
0.8999	273.16	16041.41	493.253
0.8999	273.16	16537.03	498.116
0.8999	273.16	17048.09	503.308
0.8999	273.16	17547.76	508.548
0.8999	273.16	18059.10	514.054
0.8999	273.16	18536.62	519.322
0.8999	273.16	19116.94	525.878
0.8999	300.00	482.33	469.85
0.8999	300.00	1000.98	469.176
0.8999	300.00	1985.54	468.062
0.8999	300.00	2984.62	467.344
0.8999	300.00	4487.26	467.101
0.8999	300.00	5490.05	467.577
0.8999	300.00	6494.83	468.59
0.8999	300.00	7501.43	470.201
0.8999	300.00	9026.42	473.764
0.8999	300.00	10503.57	478.718
0.8999	300.00	11505.01	482.859
0.8999	300.00	12492.05	487.56
0.8999	300.00	13505.38	493.085
0.8999	300.00	14495.13	499.048
0.8999	300.00	15514.52	505.799
0.8999	300.00	16489.81	512.809
0.8999	300.00	16993.59	516.634
0.8999	300.00	17510.91	520.691
0.8999	300.00	18011.62	524.748
0.8999	300.00	18523.05	529.002
0.8999	300.00	19042.85	533.448
0.8999	300.00	19955.15	541.498
0.8999	325.00	473.90	486.997
0.8999	325.00	976.85	486.836
0.8999	325.00	1477.54	486.663
0.8999	325.00	2481.56	486.492
0.8999	325.00	3486.42	486.705
0.8999	325.00	4485.52	487.28
0.8999	325.00	5487.25	488.283
0.8999	325.00	6484.73	489.677
0.8999	325.00	7483.33	491.535
0.8999	325.00	8497.39	493.863
0.8999	325.00	9494.23	496.639
0.8999	325.00	10492.66	499.871
0.8999	325.00	11475.31	503.566
0.8999	325.00	12500.25	507.854
0.8999	325.00	13503.38	512.522
0.8999	325.00	14493.45	517.559
0.8999	325.00	15293.58	521.983
0.8999	325.00	15994.51	526.061
0.8999	325.00	16484.64	529.048
0.8999	325.00	16992.20	532.23
0.8999	325.00	17520.21	535.657
0.8999	325.00	17995.45	538.814
0.8999	325.00	18490.30	542.215
0.8999	325.00	18993.41	545.758
0.8999	325.00	19503.94	549.411
0.8999	325.00	19905.77	552.384
0.8999	350.00	489.40	503.045
0.8999	350.00	990.00	503.092
0.8999	350.00	1981.52	503.391
0.8999	350.00	3476.80	504.312
0.8999	350.00	4993.27	506.115
0.8999	350.00	6484.03	508.509
0.8999	350.00	7487.58	510.596
0.8999	350.00	8493.70	513.012
0.8999	350.00	9502.08	515.827
0.8999	350.00	10503.14	518.95
0.8999	350.00	11996.27	524.334
0.8999	350.00	13498.05	530.471
0.8999	350.00	14498.21	535.04
0.8999	350.00	15505.00	539.958
0.8999	350.00	16499.97	545.162
0.8999	350.00	17495.27	550.647
0.8999	350.00	18508.51	556.568
0.8999	350.00	19509.30	562.67
0.8999	350.00	20352.39	568.049
0.8999	375.00	480.89	517.606
0.8999	375.00	974.52	518.004
0.8999	375.00	1977.77	518.72
0.8999	375.00	2982.45	519.779
0.8999	375.00	4474.76	521.686
0.8999	375.00	5993.90	524.499
0.8999	375.00	7482.90	527.662
0.8999	375.00	8485.87	530.296
0.8999	375.00	9494.86	533.164
0.8999	375.00	10490.61	536.22
0.8999	375.00	11481.69	539.605
0.8999	375.00	12499.83	543.464
0.8999	375.00	13464.61	547.302
0.8999	375.00	14474.74	551.755
0.8999	375.00	15492.62	556.408
0.8999	375.00	16439.96	560.926
0.8999	375.00	17489.72	566.34
0.8999	375.00	18171.66	569.916
0.8999	375.00	18704.92	572.844

Sources

• Experimental determination of (p,.rho.,T) data for binary mixtures of methane and helium
• Accurate experimental (p, .rho., T) values and virial coefficients for the (methane and helium) binary system
• Speeds of sound for (CH4 + He) mixtures from p = (0.5 to 20) MPa at T = (273.16 to 375) K