
%0 Journal Article
%A Hooper, MA 
%A Nordholm, S 
%T Generalized van der Waals theory. IV. Variational determination of the hard-sphere diameter
%J Australian Journal of Chemistry
%D 1981/09/01
%V 34
%N 9
%P 1809-1818
%K 
%R https://doi.org/10.1071/CH9811809
%U https://www.publish.csiro.au/paper/CH9811809 
%X The generalized van der Waals theory is here extended by incorporating the hard-sphere diameter as a variational parameter. Moreover, the entropy functional has been chosen so as to accurately reflect the density dependence of the excluded volume revealed by the hard-sphere equation of state. The combined effect of these two improvements yields a theory capable of describing the equation of state of the Lennard- Jones model of classical fluids to an accuracy comparable to that of the pair correlation theories. The results presented here include critical parameters and coexistence and vapour pressure curves. 
