Third virial coefficient of simple linear molecules

Publisher Website
Google Scholar
Abstract
The third virial coefficient of nitrogen, oxygen and ethane is calculated from a potential which uses a site-site repulsive model and the usual contributions to the long range forces. The model contains three adjustable parameters, which are fitted to the second virial coefficient and the Joule-Thomson coefficient. Nonadditive three-body dispersion forces are derived. The numerical evaluations of the third virial coefficient is discussed in some detail. When account is taken of the non-additive dispersion forces, the third virial coefficients are considerably overestimated. However, a universal correlation of this contribution with the non-dimensional polarizability is proposed. This permits accurate predictions of the third virial coefficients.

This publication has 9 references indexed in Scilit: