$P\; +\;\frac{n^2\cdot a}{V^2}(V- n\cdot b)$$ = $$n\;R\;T $
To convert 'a' into $\frac{atm L^2}{mol^2}$ multiply by $0.986 \; \frac{atm}{bar}$ To convert 'a' into $\frac{kPa L^2}{mol^2}$ multiply by $100.0\; \frac{kPa}{bar}$
| Molecular Formula | Name | a $\frac{bar\cdot L^2}{mol^2}$ | b $\frac{L}{mol}$ |
| AlCl3 |
Aluminum trichloride |
42.63 |
0.2450 |
| NH3 |
Ammonia |
4.225 |
0.03713 |
| NH4Cl |
Ammonium chloride |
2.380 |
0.00734 |
| Ar |
Argon |
1.355 |
0.03201 |
| BCl3 |
Boron trichloride |
15.60 |
0.1222 |
| BF3 |
Boron trifluoride |
3.98 |
0.05443 |
| B2H6 |
Diborane |
6.048 |
0.07437 |
| Br2 |
Bromine |
9.75 |
0.0591 |
| ClFO2 |
Perchloryl fluoride |
7.371 |
0.07130 |
| ClF5 |
Chlorine pentafluoride |
9.58 |
0.08204 |
| ClH4P |
Phosphonium chloride |
4.111 |
0.04545 |
| Cl2 |
Chlorine |
6.343 |
0.05422 |
| Cl3FSi |
Trichlorofluorosilane |
15.67 |
0.1273 |
| F2 |
Fluorine |
1.171 |
0.02896 |
| GeCl4 |
Germanium tetrachloride |
23.12 |
0.1489 |
| F3N |
Nitrogen trifluoride |
3.58 |
0.05453 |
| F3P |
Phosphorus trifluoride |
4.954 |
0.06510 |
| F4N2 |
Tetrafluorohydrazine |
7.426 |
0.08564 |
| GeH4 |
Germane |
5.743 |
0.06555 |
| He |
Helium |
0.0346 |
0.0238 |
| HBr |
Hydrogen bromide |
4.500 |
0.04415 |
| HCl |
Hydrogen chloride |
3.700 |
0.04061 |
| HCN |
Hydrogen cyanide |
11.29 |
0.08806 |
| HF |
Hydrogen fluoride |
9.565 |
0.0739 |
| HI |
Hydrogen iodide |
6.309 |
0.05303 |
| H2 |
Hydrogen |
0.2453 |
0.02651 |
| H2O |
Water |
5.537 |
0.03049 |
| H2S |
Hydrogen sulphide |
4.544 |
0.04339 |
| H2Se |
Hydrogen selenide |
5.523 |
0.0479 |
| Kr |
Krypton |
2.325 |
0.0396 |
| SiH4 |
Silane |
4.38 |
0.0579 |
| SiCl4 |
Silicon tetrachloride |
20.96 |
0.1470 |
| SiF4 |
Silicon tetrafluoride |
5.259 |
0.07236 |
| TiCl4 |
Titanium(IV) chloride |
25.47 |
0.1423 |
| Hg |
Mercury |
5.193 |
0.01057 |
| NO |
Nitric oxide |
1.46 |
0.0289 |
| NO2 |
Nitrogen dioxide |
5.36 |
0.0443 |
| N2 |
Nitrogen |
1.370 |
0.0387 |
| N2O |
Nitrous oxide |
3.852 |
0.04435 |
| N2H4 |
Hydrazine |
8.46 |
0.0462 |
| Ne |
Neon |
0.208 |
0.01672 |
| O2 |
Oxygen |
1.382 |
0.03186 |
| O3 |
Ozone |
3.570 |
0.0487 |
| P |
Phosphorus |
53.6 |
0.157 |
| PH3 |
Phosphine |
4.696 |
0.05157 |
| Rn |
Radon |
6.601 |
0.06239 |
| SnCl4 |
Stannic chloride |
27.25 |
0.1641 |
| S |
Sulphur |
24.3 |
0.0660 |
| SO2 |
Sulphur dioxide |
6.865 |
0.05679 |
| SF6 |
Sulphur hexafluoride |
7.857 |
0.08786 |
| Se |
Selenium |
33.4 |
0.0675 |
| UF6 |
Uranium(VI) fluoride |
16.01 |
0.1128 |
| WF6 |
Tungsten(VI) fluoride |
13.25 |
0.1063 |
| Xe |
Xenon |
4.192 |
0.05156 |
| XeF2 |
Xenon difluoride |
12.46 |
0.07037 |
| XeF4 |
Xenon tetrafluoride |
15.52 |
0.09035 |
| CClF3 |
Chlorotrifluoromethane |
6.873 |
0.08110 |
| CCl3F |
Trichlorofluoromethane |
14.68 |
0.1111 |
| CCl4 |
Tetrachloromethane |
20.01 |
0.1281 |
| CF4 |
Tetrafluoromethane |
4.040 |
0.06325 |
| CO |
Carbon monoxide |
1.472 |
0.03948 |
| COS |
Carbon oxysulphide |
6.975 |
0.06628 |
| CO2 |
Carbon dioxide |
3.658 |
0.04286 |
| CS2 |
Carbon disulphide |
11.25 |
0.07262 |
| CHCl3 |
Trichloromethane |
15.34 |
0.1019 |
| CHF3 |
Trifluoromethane |
5.378 |
0.06403 |
| CH2Cl2 |
Dichloromethane |
12.44 |
0.08689 |
| CH2F2 |
Difluoromethane |
6.184 |
0.06268 |
| CH3Cl |
Chloromethane |
7.566 |
0.06477 |
| CH3F |
Fluoromethane |
5.009 |
0.05617 |
| NH3NO2 |
Nitromethane |
17.18 |
0.1041 |
| CH4 |
Methane |
2.300 |
0.04301 |
| CH3OH |
Methanol |
9.472 |
0.06584 |
| CH3SH |
Methanethiol |
8.911 |
0.06756 |
| CH3NH2 |
Methylamine |
7.106 |
0.05879 |
| C2Cl2F3 |
1,1,2-Trichlorotrifluoroethane |
20.25 |
0.1481 |
| C2F4 |
Tetrafluoroethylene |
6.954 |
0.08085 |
| C2N2 |
Cyanogen |
7.803 |
0.6952 |
| C2H2 |
Acetylene |
4.516 |
0.05220 |
| C2H2F2 |
1,1-Difluoroethylene |
6.000 |
0.07058 |
| C2H3Cl3 |
1,1,1-Trichloroethane |
20.15 |
0.1317 |
| C2H3F |
Fluroethylene |
5.984 |
0.06504 |
| C2H3F3 |
1,1,1-Trifluoroethane |
9.302 |
0.09572 |
| C2H3N |
Acetonitrile |
17.89 |
0.1169 |
| C2H4 |
Ethylene |
4.612 |
0.05821 |
| C2H4Cl2 |
1,1-Dichloroethane |
15.73 |
0.1072 |
| C2H4Cl2 |
1,2-Dichloroethane |
17.0 |
0.108 |
| C2H4O |
Ethylene oxide |
8.922 |
0.06779 |
| CH3COOH |
Acetic acid |
17.71 |
0.1065 |
| C2H4O2 |
Methyl formate |
11.54 |
0.08442 |
| C2H5Br |
Bromoethane |
11.89 |
0.08406 |
| C2H5Cl |
Chloroethane |
11.7 |
0.090 |
| C2H5F |
Fluoroethane |
8.170 |
0.07758 |
| C2H6 |
Ethane |
5.570 |
0.06499 |
| C2H6O |
Dimethyl ether |
8.690 |
0.07742 |
| C2H5OH |
Ethanol |
12.56 |
0.08710 |
| C2H5SH |
Dimethyl sulphide |
13.34 |
0.09453 |
| C2H5SH |
Ethanethiol |
13.23 |
0.09447 |
| C2H7N |
Dimethylamine |
10.44 |
0.08510 |
| C2H7N |
Ethylamine |
10.79 |
0.08433 |
| C3F8 |
Perfluoropropane |
12.96 |
0.1338 |
| C3H5N |
Propanenitrile |
21.57 |
0.1369 |
| C3H6 |
Propene |
8.438 |
0.08242 |
| C3H6 |
Cyclopropane |
8.293 |
0.07420 |
| C3H6O |
Acetone |
16.02 |
0.1124 |
| C3H6O |
Propanal |
14.08 |
0.09947 |
| C3H6O2 |
Ethyl formate |
15.91 |
0.1115 |
| C3H6O2 |
Methyl acetate |
15.75 |
0.1108 |
| C3H6O2 |
Propanoic acid |
23.49 |
0.1386 |
| C3H7Cl |
1-Chloropropane |
16.11 |
0.1141` |
| C3H8 |
Propane |
9.385 |
0.09044 |
| C3H8O |
1-Propanol |
16.26 |
0.1080 |
| C3H8O |
2-Propanol |
15.82 |
0.1109 |
| C3H8O |
Ethyl methyl ether |
12.70 |
0.1034 |
| C3H8S |
Ethyl methyl sulphide |
19.45 |
0.1300 |
| C3H9N |
Propylamine |
15.26 |
0.1094 |
| C3H9N |
Trimethylamine |
13.37 |
0.1101 |
| C4H4O |
Furan |
12.74 |
0.0926 |
| C4H4S |
Thiophene |
17.21 |
0.1058 |
| C4H4N |
Pyrrole |
18.82 |
0.1049 |
| C4H6 |
1,3-Butadiene |
12.17 |
0.1020 |
| C4H6O3 |
Acetic anhydride |
26.8 |
0.157 |
| C4H7N |
Butanenitrile |
25.76 |
0.1568 |
| C4H8 |
1-Butene |
12.76 |
0.1084 |
| C4H8 |
Cyclobutane |
12.39 |
0.0960 |
| C4H8O |
2-Butanone |
19.97 |
0.1326 |
| C4H8O |
Tetrahydrofuran |
16.39 |
0.1082 |
| C4H8O2 |
1,4-Dioxane |
19.29 |
0.1171 |
| C4H8O2 |
Ethyl acetate |
20.57 |
0.1401 |
| C4H8O2 |
Methyl propanoate |
20.51 |
0.1377 |
| C4H8O2 |
Propyl formate |
20.79 |
0.1377 |
| C4H8O2 |
Butanoic acid |
28.18 |
0.1609 |
| C4H9N |
Pyrrolidine |
16.84 |
0.1056 |
| C4H10 |
Butane |
13.93 |
0.1168 |
| C4H10 |
Isobutane |
13.36 |
0.1168 |
| C4H10O |
1-Butanol |
20.90 |
0.1323 |
| C4H10O |
2-Methyl-2-propanol |
18.81 |
0.1324 |
| C4H10O |
2-Methyl-1-propanol |
20.35 |
0.1324 |
| C4H10O |
Diethyl ether |
17.46 |
0.1333 |
| C4H10S |
Diethyl sulphide |
22.85 |
0.1462 |
| C4H11N |
Butylamine |
19.41 |
0.1301 |
| C4H11N |
Diethylamine |
19.40 |
0.1383 |
| C4H12Si |
Tetramethylsilane |
20.81 |
0.1653 |
| C5H4O2 |
Furfural |
22.23 |
0.1182 |
| C5H5N |
Pyridine |
19.77 |
0.1137 |
| C5H8 |
Cyclopentene |
15.61 |
0.1097 |
| C5H10 |
1-Pentene |
17.86 |
0.1370 |
| C5H10 |
2-Methyl-1-butene |
16.9 |
0.129 |
| C5H10 |
2-Methyl-2-butene |
17.26 |
0.1279 |
| C5H10 |
Cyclopentane |
16.94 |
0.1180 |
| C5H10O |
Tetrahydropyran |
20.02 |
0.1247 |
| C5H10O2 |
Isobutyl formate |
22.82 |
0.1476 |
| C5H10O2 |
Propyl acetate |
26.23 |
0.1700 |
| C5H10O2 |
Ethyl propanoate |
25.86 |
0.1688 |
| C5H10O2 |
Methyl butanoate |
25.83 |
0.1661 |
| C5H10O2 |
Methyl isobutanoate |
24.87 |
0.1639 |
| C5H11N |
Piperidine |
20.84 |
0.1250 |
| C5H12 |
Pentane |
19.13 |
0.1451 |
| C5H12 |
Isopentane |
18.29 |
0.1415 |
| C5H12 |
Neopentane |
17.17 |
0.1410 |
| C5H12O |
1-Pentanol |
25.81 |
0.1564 |
| C6H5Br |
Bromobenzene |
28.96 |
0.1541 |
| C6H5Cl |
Chlorobenzene |
25.80 |
0.1454 |
| C6H5F |
Fluorobenzene |
20.10 |
0.1279 |
| C6H5I |
Iodobenzene |
33.54 |
0.1658 |
| C6H6 |
Benzene |
18.82 |
0.1193 |
| C6H5OH |
Phenol |
22.93 |
0.1177 |
| C6H5NH2 |
Aniline |
29.14 |
0.1486 |
| C6H10O |
Cyclohexanone |
31.1 |
0.170 |
| C6H11N |
Hexanenitrile |
35.50 |
0.1996 |
| C6H12 |
Cyclohexane |
21.95 |
0.1413 |
| C6H11OH |
Cyclohexanol |
28.93 |
0.1586 |
| C6H12O2 |
Pentyl formate |
27.97 |
0.1730 |
| C6H12O2 |
Isobutyl acetate |
29.05 |
0.1845 |
| C6H12O2 |
Ethyl butanoate |
30.53 |
0.1922 |
| C6H12O2 |
Ethyl 2-methylpropanoate |
29.05 |
0.1872 |
| C6H12O2 |
Methyl pentanoate |
29.39 |
0.1847 |
| C6H14 |
Hexane |
24.97 |
0.1753 |
| C6H14 |
2,3-Dimethylbutane |
23.29 |
0.1660 |
| C6H14O |
1-Hexanol |
31.35 |
0.1829 |
| C6H15N |
Triethylamine |
27.59 |
0.1836 |
| C6H15N |
Dipropylamine |
24.82 |
0.1591 |
| C7H5N |
Benzonitrile |
33.89 |
0.1727 |
| C7H6O |
Benzaldehyde |
30.30 |
0.1553 |
| C7H8 |
Toluene |
24.89 |
0.1499 |
| C7H8O |
o-Cresol |
28.33 |
0.1447 |
| C7H8O |
m-Cresol |
31.86 |
0.1609 |
| C7H8O |
p-Cresol |
28.11 |
0.1422 |
| C7H8O |
Benzyl alcohol |
34.7 |
0.173 |
| C7H8O |
Anisole |
28.60 |
0.1579 |
| C7H16 |
Heptane |
30.89 |
0.2038 |
| C7H15OH |
Heptanol |
37.22 |
0.2097 |
| C8H10 |
Ethylbenzene |
30.86 |
0.1782 |
| C8H10 |
o-Xylene |
31.06 |
0.1756 |
| C8H10 |
m-Xylene |
31.41 |
0.1814 |
| C8H10 |
p-Xylene |
31.54 |
0.1824 |
| C8H10O |
Phenetole |
35.70 |
0.1966 |
| C8H11N |
N,N-Dimethylaniline |
37.92 |
0.1967 |
| C8H18 |
Octane |
37.86 |
0.2372 |
| C8H18 |
2,5-Dimethylhexane |
35.49 |
0.2299 |
| C8H18O |
1-Octanol |
43.42 |
0.2371 |
| C9H7N |
Quinoline |
36.70 |
0.1672 |
| C9H12 |
Cumene |
36.20 |
0.2044 |
| C9H12 |
Propylbenzene |
37.14 |
0.2073 |
| C9H12 |
1,2,4-Trimethylbenzene |
38.03 |
0.2088 |
| C9H12 |
Mesitylene |
37.87 |
0.2118 |
| C9H20 | Nonane |
45.11 |
0.2702 |
| C9H20O |
1-Nonanol |
50.00 |
0.2654 |
| C10H8 |
Naphthalene |
40.32 |
0.1920 |
| C10H14 |
Butylbenzene |
44.07 |
0.2378 |
| C10H14 |
Isobutylbenzene |
40.40 |
0.2215 |
| C10H14 |
o-Cymene |
42.7 |
0.234 |
| C10H14 | p-Cymene |
45.27 |
0.2478 |
| C10H14 |
p-Diethylbenzene |
45.03 |
0.2439 |
| C10H14 |
1,2,4,5-Tetramethylbenzene |
45.8 |
0.24 |
| C10H22 |
Decane |
52.88 |
0.3051 |
| C10H22O |
1-Decanol |
57.45 |
0.2971 |
| C11H24 |
Undecane |
60.88 |
0.3396 |
| C12H10 |
Biphenyl |
47.16 |
0.2130 |
| C12H26 |
Dodecane |
69.14 |
0.3741 |
| C12H26O |
1-Dodecanol |
72.69 |
0.3598 |
| C13H12 |
Diphenylmethane |
60.46 |
0.2798 |
| C13H28 |
Tridecane |
77.94 |
0.4109 |
| C13H28O |
1-Tridecanol |
81.20 |
0.3942 |
| C14H30O |
1-Tetradecanol |
89.91 |
0.4289 |
| C15H32 |
Pentadecane |
96.50 |
0.4857 |