The behaviour of fluids of Quasi-Spherical molecules. II. High density gases and liquids

Abstract

Lennard-Jones and Devonshire's (1937) cell method has been used to compute some properties of dense fluids composed of effectively spherical molecules interacting according to the potential

U( R ) = A/R²⁸ - B/R⁷

The results are quite different from those for the more usual (12,6) potential and they explain the failure of such substances as CI₄, SF₆, . . . , to obey the same law of corresponding states as the inert gases. In particular the different entropies of evaporation (Trouton constants) of the two classes of materials are given correctly by the theory.