Table 4: Volumes and linear dimensions for twoatomic molecules in ellipsoidal model.

Sample 𝑇 𝑐 𝑃 𝑐 𝑉 𝑐 ( 𝑑 𝑃 / 𝑑 𝑇 ) 𝑐 2 𝑐 𝑉 0 𝐴 𝑏

H2 33.2313.16 6.39 1.870.7412.491.471.43
N2126.2533.968.95 1.561.1041.752.202.13
O2154.7750.87 7.34 1.921.2135.182.092.01
F2144.0052.206.62 2.251.4236.832.152.03
Cl2417.1777.0912.38 1.121.9958.042.542.34
CO132.9434.989.36 1.501.1343.882.242.17

𝑇 𝑐 is the critical temperatrue (K), 𝑃 𝑐 *10−5 is the critical pressure (Pa), 𝑉 𝑐 *105 is the critical (geometrical) volume (m3/mole), ( 𝑑 𝑃 / 𝑑 𝑇 ) 𝑐 *10−5 (Pa/K) is taken at the critical point, 𝑉 0 *1030 (m3) is the calculated inaccessible molecule volume, 2 𝑐 *1010 (m) is the distance between the atoms in the molecule, and 𝑎 *1010 and 𝑏 *1010 (m) are the major and minor semiaxes of ellipsoid.