Statistical-mechanical analytical equation of state for fluid mixtures

1 September 1990

journal article
research article
Published by Taylor & Francis in Molecular Physics

Vol. 71 (1) , 109-121
https://doi.org/10.1080/00268979000101671

Abstract

A new analytical equation of state for fluid mixtures is presented, which is both simple and accurate enough to describe the thermodynamic properties of a general fluid mixture over its entire density range. It is derived by statistical-mechanical perturbation theory for hard-sphere mixtures, as a generalization of Song and Mason's equation for pure fluids. Agreement with computer simulations for Lennard-Jones binary mixtures is quite remarkable. The equation of state can be calculated if all the intermolecular potentials are known, but for practical purposes knowledge of just the second virial coefficients is sufficient to determine the whole equation of state.

Keywords

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