Modern Thermodynamics
- Chapter 1
25
Table 1.1 van der Waals constants a and b and critical constants Tc, pc and Vmc
Gas ___a___
bar L2 mol-2
___b___
L mol-1
__ Tc _
K
__pc__
bar
__
Vmc__
L mol-1
Acetylene(C2H2) 4.516 0.0522 308.3 61.39 0.113
Ammonia(NH3) 4.225 0.0371 405.5 113.5 0.072
Argon (Ar) 1.355 0.0320 150.9 49.55 0.075
Carbon dioxide (CO2) 3.658 0.0429 304.1 73.75 0.094
Carbon monoxide(CO) 1.472 0.0395 132.9 34.99 0.093
Chlorine(Cl2) 6.343 0.0542 416.9 79.91 0.123
Ethanol(C2H5OH) 12.56 0.0871 513.9 61.32 0.167
Helium (He) 0.0346 0.0238 5.19 2.22 0.057
Hydrogen(H2) 0.245 0.0265 32.97 12.93 0.065
Hydrogen chloride(HCl) 3.700 0.0406 324.7 83.1 0.081
Methane(CH4) 2.300 0.0430 190.5 46.04 0.099
Nitric oxide(NO) 1.46 0.0289 180 64.8 0.058
Nitrogen (N2) 1.370 0.0387 126.2 33.9 0.090
Oxygen (O2) 1.382 0.0319 154.59 50.43 0.073
Propane (C3H8) 9.385 0.0904 369.82 42.50 0.203
Sulfur dioxide(SO2) 6.865 0.0568 430.8 78.84 0.122
Sulfur hexafluoride (SF6) 7.857 0.0879 318.69 37.7 0.199
Water(H2O) 5.537 0.0305 647.14 220.6 0.056
Source: Extensive listing of van der Waals constants can be found in data source D. R. Lide (Ed.)
"CRC Handbook of Chemistry and Physics" 75th Edition. 1994, CRC Press: Ann Arbor
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