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/content/aip/journal/jcp/143/7/10.1063/1.4929392
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/content/aip/journal/jcp/143/7/10.1063/1.4929392
2015-08-21
2016-09-30

Abstract

The mathematical structure imposed by the thermodynamic critical point motivates an approximant that synthesizes two theoretically sound equations of state: the parametric and the virial. The former is constructed to describe the critical region, incorporating all scaling laws; the latter is an expansion about zero density, developed from molecular considerations. The approximant is shown to yield an equation of state capable of accurately describing properties over a large portion of the thermodynamic parameter space, far greater than that covered by each treatment alone.

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