Some observations regarding the prediction of isochoric heat capacities by engineering EOS models

Ilya Polishuk, Jaime Wisniak, Hugo Segura

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

This study evaluates the accuracy of different analytical EOS models in predicting isochoric heat capacity experimental data, a subject that has not received major attention so far. Contributions of the temperature dependency for the cohesive parameter, the Dieterici's and the expression derived for the description of association empirically attached to a generalized van der Waals-like equation, have been considered. It has been found that the temperature dependency of the cohesive parameter may improve the performance of the model at low temperatures and the expression derived for the description of association may qualitatively improve the description of the trend of the data near the critical temperature. None of the analyzed models can describe the behavior of the data at very high pressures.

Original languageEnglish
Pages (from-to)121-125
Number of pages5
JournalFluid Phase Equilibria
Volume277
Issue number2
DOIs
StatePublished - 25 Mar 2009

Keywords

  • Association part
  • Dieterici model
  • EOS
  • Isochoric heat capacity

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