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The Dieterici alternative to the van der Waals approach for equations of state: Second virial coefficients

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posted on 2024-07-09, 22:35 authored by Richard SadusRichard Sadus
Historically, the development of equations of state for fluids has almost invariably followed the lead of the van der Waals equation by simply adding together contributions from intermolecular repulsion and attraction. Recently an alternative approach, first suggested by Dieterici (Ann. Phys. Chem. Wiedemanns Ann.,1899, 69, 685), has been revised (R. J. Sadus, J. Chem. Phys., 2001, 115, 1460) with the benefit of modern developments in equations of state. In contrast to the traditional van der Waals-type equations of state, the Dieterici approach results in an equation of state that is the product of a repulsive term with an exponential attractive term. This formulation significantly enhances the accuracy of the prediction of vapour–liquid equilibria, particularly in the vicinity of the critical point. In this work, the ability of the equation to predict second virial coefficients is investigated. A comparison is also reported with traditional van der Waals-type equations of state. The results indicate that the Dieterici approach yields superior prediction of the second virial coefficients.

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ISSN

1463-9076

Journal title

Physical Chemistry Chemical Physics

Volume

4

Issue

6

Pagination

919-921

Publisher

Royal Society of Chemistry

Copyright statement

Copyright © 2002 The Royal Society of Chemistry. The authors give the Royal Society of Chemistry the exclusive right and licence throughout the world to edit, adapt, translate, reproduce and publish the Paper in all formats, in all media and by all means (whether now existing or in future devised). The published version is reproduced for non-commercial purposes only in accordance with the copyright policy of the publisher. This paper is made available for personal use only; no further reuse is permitted.

Language

eng

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