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Critical scaling laws and a classical equation of state

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Abstract

In this paper we present a method which modifies a classical equation of state by incorporating the nonclassical critical behavior. As an example we have applied our procedure to the Carnahan-Starling-DeSantis (CSD) equation of state. The resulting equation reproduces the universal scaling behavior near the critical point and reduces to the universal ideal-gas behavior at low densities. We show that the renormalized CSD equation yields an improved and consistent representation of both mechanical and caloric thermodynamic properties. In addition, the suppression of the critical temperature due to the critical fluctuations is clearly demonstrated.

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Author notes

  1. G. X. Jin

    Present address: Laboratory of Neuropsychology, National Institutes of Health, Bethesda, Maryland, 20982, USA

Authors and Affiliations

  1. Institute for Physical Science and Technology, University of Maryland, College Park, Maryland, 20742, USA

    A. van Pelt, G. X. Jin & J. V. Sengers

  2. Thermophysics Division, National Institute of Standards and Technology, Gaithersburg, Maryland, 20899, USA

    J. V. Sengers

Authors
  1. A. van Pelt
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  2. G. X. Jin
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  3. J. V. Sengers
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van Pelt, A., Jin, G.X. & Sengers, J.V. Critical scaling laws and a classical equation of state. Int J Thermophys 15, 687–697 (1994). https://doi.org/10.1007/BF03354059

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  • DOI: https://doi.org/10.1007/BF03354059

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