常见理想气体的定压比热容表理想气体的定压比热容cp/(kj/kg·k) 名称
分子式
温度/℃
-40
10
60
110
160
260
360
460
760
1200
氢
h2
14.83
14.29
14.11
14.09
14.18
14.43
14.67
14.84
15.02
16.25
氧
o2
0.9378
0.9169
0.9169
0.9253
0.9420
0.9797
1.013
1.043
1.097
1.147
氮
n2
1.089
1.043
1.026
1.026
1.034
1.059
1.089
1.118
1.172
1.252
氨
nh3
2.005
2.043
2.114
2.186
2.303
2.508
2.700
2.881
3.329
3.869
一氧化碳
co
1.084
1.043
1.029
1.030
1.038
1.068
1.101
1.130
1.189
1.264
二氧化碳
co2
0.7997
0.8289
0.8709
0.9043
0.9546
1.030
1.097
1.147
1.243
1.340
二氧化硫
so2
0.5862
0.6071
0.6322
0.6573
0.6908
0.7411
0.7787
0.8122
0.8541
0.8960
硫化氢
h2s
0.9839
0.9797
0.9964
1.013
1.051
1.118
1.176
1.235
1.361
1.524
甲烷
ch4
2.077
2.189
2.336
2.466
2.675
3.031
3.383
3.689
4.568
5.355
乙烷
c2h6
1.465
1.692
1.913
2.081
2.336
2.721
3.077
3.395
4.153
4.823
丙烷
c3h8
1.344
1.603
1.846
2.026
2.290
2.684
3.031
3.337
4.036
4.652
正丁烷
c4h10
1.361
1.612
1.846
2.022
2.282
2.663
3.002
3.295
3.965
4.555
正戊烷
c5h12
1.352
1.603
1.838
2.009
2.265
2.646
2.977
3.266
3.923
4.492
正已烷
c6h14
1.339
1.591
1.825
2.001
2.257
2.633
2.960
3.249
3.889
4.455
正庚烷
c7h16
1.336
1.587
1.821
1.993
2.248
2.625
2.952
3.232
3.869
4.425
正辛烷
c8h18
1.336
1.583
1.817
1.993
2.244
2.617
2.943
3.224
3.852
4.400
整壬烷
c9h20
1.331
1.583
1.817
1.989
2.240
2.613
2.935
3.215
3.839
4.384
正癸烷
c10h22
1.331
1.578
1.813
1.985
2.236
2.608
2.931
3.207
3.831
4.371
环戊烷
c5h10
0.7913
1.105
1.800
1.578
1.863
2.273
2.629
2.935
3.630
4.199
甲基环戊烷
c6h12
0.9295
1.231
1.499
1.687
1.964
2.361
2.705
3.002
3.663
4.216
乙基环戊烷
c7h14
0.9504
1.256
1.528
1.721
1.997
2.399
2.738
3.035
3.689
4.442
环己烷
c6h12
0.8499
1.181
1.469
1.679
1.976
2.412
2.784
3.107
3.831
4.371
甲基环己烷
c7h14
0.9797
1.294
1.578
1.679
2.072
2.491
2.851
3.161
3.848
4.371
乙基环己烷
c8h16
1.026
1.336
1.612
1.813
2.098
2.512
2.868
3.169
3.839
4.358
乙烯
c2h4
1.298
1.495
1.687
1.829
2.043
2.357
2.633
2.872
3.416
3.919
丙稀
c3h6
1.256
1.461
1.658
1.805
2.026
2.353
2.642
2.897
3.479
3.998
丁烯-1
c4h8
1.231
1.461
1.679
1.838
2.068
2.412
2.709
2.968
3.546
4.065
戊烯-1
c5h10
1.269
1.499
1.712
1.871
2.106
2.449
2.747
3.006
3.588
4.099
己烯-1
c6h12
1.277
1.507
1.725
1.884
2.123
2.466
2.767
3.031
3.613
4.124
庚烯-1
c7h14
1.281
1.516
1.733
1.897
2.135
2.483
2.784
3.048
3.630
4.141
辛烯-1
c8h16
1.285
1.520
1.742
1.905
2.144
2.491
2.797
3.061
3.643
4.153
环戊烯
0.7704
1.038
1.281
1.453
1.699
2.060
2.369
2.642
3.249
3.726
丙二烯
c3h4
1.256
1.424
1.583
1.704
1.884
2.144
2.366
2.554
2.964
3.349
乙炔
c2h2
1.566
1.654
1.750
1.825
1.943
2.114
2.252
2.366
2.579
3.872
丙炔
c3h4
1.327
1.470
1.612
1.721
1.884
2.131
2.345
2.529
2.931
3.324
丁炔-1
c4h6
1.277
1.453
1.624
1.750
1.938
2.219
2.458
2.667
3.123
3.555
苯
c6h6
0.7536
0.9881
1.193
1.339
1.549
1.846
2.089
2.294
2.730
3.081