Abstract
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.
Cited by
28 articles.
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