Van der Waals constants (data page)


The following table lists the van der Waals constants for a number of common gases and volatile liquids.
To convert from to, multiply by 100.
a b
Acetic acid17.710.1065
Acetic anhydride20.1580.1263
Acetone16.020.1124
Acetonitrile17.810.1168
Acetylene4.5160.0522
Ammonia4.2250.0371
Argon1.3550.03201
Benzene18.240.1154
Bromobenzene28.940.1539
Butane14.660.1226
Carbon dioxide3.6400.04267
Carbon disulfide11.770.07685
Carbon monoxide1.5050.03985
Carbon tetrachloride19.74830.1281
Chlorine6.5790.05622
Chlorobenzene25.770.1453
Chloroethane11.050.08651
Chloromethane7.5700.06483
Cyanogen7.7690.06901
Cyclohexane23.110.1424
Diethyl ether17.610.1344
Diethyl sulfide19.000.1214
Dimethyl ether8.1800.07246
Dimethyl sulfide13.040.09213
Ethane5.5620.0638
Ethanethiol11.390.08098
Ethanol12.180.08407
Ethyl acetate20.720.1412
Ethylamine10.740.08409
Fluorobenzene20.190.1286
Fluoromethane4.6920.05264
Freon10.780.0998
Germanium tetrachloride22.900.1485
Helium0.03460.0238
Hexane24.710.1735
Hydrogen0.24760.02661
Hydrogen bromide4.5100.04431
Hydrogen chloride3.7160.04081
Hydrogen selenide5.3380.04637
Hydrogen sulfide4.4900.04287
Iodobenzene33.520.1656
Krypton2.3490.03978
Mercury8.2000.01696
Methane2.2830.04278
Methanol9.6490.06702
Neon0.21350.01709
Nitric oxide1.3580.02789
Nitrogen1.3700.0387
Nitrogen dioxide5.3540.04424
Nitrous oxide3.8320.04415
Oxygen1.3820.03186
Pentane19.260.146
Phosphine4.6920.05156
Propane8.7790.08445
Radon6.6010.06239
Silane4.3770.05786
Silicon tetrafluoride4.2510.05571
Sulfur dioxide6.8030.05636
Tin tetrachloride27.270.1642
Toluene24.380.1463
Water5.5360.03049
Xenon4.2500.05105

Units

1 J·m3/mol2 = 1 m6·Pa/mol2 = 10 L2·bar/mol2
1 L2atm/mol2 =.101325 J·m3/mol2 = 0.101325 Pa·m6/mol2
1 dm3/mol = 1 L/mol = 1 m3/kmol