Author： Ameling W. Shukla K.P. Lucas K.
Publisher： Taylor & Francis Ltd
ISSN： 1362-3028
Source： Molecular Physics, Vol.58, Iss.2, 1986-06, pp. : 381-394
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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.
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