Research Article

Thermodynamic Properties of Vapors from Speed of Sound

Table 3

The calculated and the reference at .

Substance [MPa]   ×  103 [K−1]
CalculatedReference

Ar
= 140 K
0.8107563
1.4993690
2.0729260
2.5387200
2.9042320
3.1682270
0.9873
1.9681
2.9453
3.9234
4.9117
5.8890
0.9873
1.9681
2.9455
3.9240
4.9134
5.8933

N2
= 115 K
0.4788111
0.8932118
1.2462020
1.5408300
1.7801230
1.9370410
1.1037
2.2079
3.3152
4.4349
5.5829
6.5622
1.1037
2.2081
3.3158
4.4364
5.5865
6.5692

CH4
= 180 K
0.8598106
1.5796330
2.1691930
2.6385480
2.9977680
3.2851810
0.8467
1.6841
2.5078
3.3268
4.1575
5.1380
0.8467
1.6841
2.5079
3.3273
4.1589
5.1412

CO2
= 290 K
1.5005140
2.7299300
3.7114140
4.4685400
5.0247630
5.3177280
0.6973
1.3783
2.0445
2.7004
3.3553
3.8461
0.6973
1.3783
2.0445
2.7005
3.3555
3.8472