Van der Waals constants (data page) explained

The following table lists the Van der Waals constants (from the Van der Waals equation) for a number of common gases and volatile liquids.[1]

To convert from

L2bar/mol2
to
L2kPa/mol2
, multiply by 100.
To convert from
L2bar/mol2
to
m6Pa/mol2
, divide by 10.
To convert from

L/mol

to
m3/mol
, divide by 1000.
 a (L2bar/mol2)b (L/mol)
Acetic acid17.70980.1065
Acetic anhydride20.1580.1263
Acetone16.020.1124
Acetonitrile17.810.1168
Acetylene4.5160.0522
Ammonia4.2250.0371
Aniline[2] 29.140.1486
Argon1.3550.03201
Benzene18.240.1193
Bromobenzene28.940.1539
Butane14.660.1226
1-Butanol20.940.1326
2-Butanone19.970.1326
Carbon dioxide3.6400.04267
Carbon disulfide11.770.07685
Carbon monoxide1.5050.0398500
Carbon tetrachloride19.74830.1281
Chlorine6.5790.05622
Chlorobenzene25.770.1453
Chloroethane11.050.08651
Chloromethane7.5700.06483
Cyanogen7.7690.06901
Cyclohexane23.110.1424
Cyclopropane8.340.0747
Decane52.740.3043
1-Decanol59.510.3086
Diethyl ether17.610.1344
Diethyl sulfide19.000.1214
Dimethyl ether8.1800.07246
Dimethyl sulfide13.040.09213
Dodecane69.380.3758
1-Dodecanol75.700.3750
Ethane5.5620.0638
Ethanethiol11.390.08098
Ethanol12.180.08407
Ethyl acetate20.720.1412
Ethylamine10.740.08409
Ethylene4.6120.0582
Fluorine1.1710.0290
Fluorobenzene20.190.1286
Fluoromethane4.6920.05264
Freon10.780.0998
Furan12.740.0926
Germanium tetrachloride22.900.1485
Helium0.03460.0238
Heptane31.060.2049
1-Heptanol38.170.2150
Hexane24.710.1735
1-Hexanol31.790.1856
Hydrazine8.460.0462
Hydrogen0.24760.02661
Hydrogen bromide4.5100.04431
Hydrogen chloride3.7160.04081
Hydrogen cyanide11.290.0881
Hydrogen fluoride9.5650.0739
Hydrogen iodide6.3090.0530
Hydrogen selenide5.3380.04637
Hydrogen sulfide4.4900.04287
Isobutane13.320.1164
Iodobenzene33.520.1656
Krypton2.3490.03978
Mercury8.2000.01696
Methane2.2530.04278
Methanol9.6490.06702
Methylamine7.1060.0588
Neon0.21350.01709
Neopentane17.170.1411
Nitric oxide1.3580.02789
Nitrogen1.3700.0387
Nitrogen dioxide5.3540.04424
Nitrogen trifluoride3.580.0545
Nitrous oxide3.8320.04415
Octane37.880.2374
1-Octanol44.710.2442
Oxygen1.3820.03186
Ozone3.5700.0487
Pentane19.260.146
1-Pentanol25.880.1568
Phenol22.930.1177
Phosphine4.6920.05156
Propane8.7790.08445
1-Propanol16.260.1079
2-Propanol15.820.1109
Propene8.4420.0824
Pyridine19.770.1137
Pyrrole18.820.1049
Radon6.6010.06239
Silane4.3770.05786
Silicon tetrafluoride4.2510.05571
Sulfur dioxide6.8030.05636
Sulfur hexafluoride7.8570.0879
Tetrachloromethane20.010.1281
Tetrachlorosilane20.960.1470
Tetrafluoroethylene6.9540.0809
Tetrafluoromethane4.0400.0633
Tetrafluorosilane5.2590.0724
Tetrahydrofuran16.390.1082
Tin tetrachloride27.270.1642
Thiophene17.210.1058
Toluene24.380.1463
1-1-1-Trichloroethane20.150.1317
Trichloromethane15.340.1019
Trifluoromethane5.3780.0640
Trimethylamine13.370.1101
Water5.5360.03049
Xenon4.2500.05105

Units

1 J·m3/mol2 = 1 m6·Pa/mol2 = 10 L2·bar/mol2

1 L2atm/mol2 = 0.101325 J·m3/mol2 = 0.101325 Pa·m6/mol2

1 dm3/mol = 1 L/mol = 1 m3/kmol = 0.001 m3/mol (where kmol is kilomoles = 1000 moles)

Notes and References

  1. Book: R. C. Weast. Handbook of Chemistry and Physics 53rd Edition. 1972. Chemical Rubber Pub..
  2. Web site: Edge . Engineers . Van der Waals Constants for Gases . 2023-04-12 . www.engineersedge.com.