Critical Anomalies and Phase Diagrams of a Binary Mixture

The study examines the behavior of a binary mixture in the vicinity of the liquid–vapor critical point. It is shown that the pressure dependence on density along the critical isotherm, predicted within the framework of the existing theory of critical phenomena, does not match the shape of the dew-bu...

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Bibliographic Details
Published inHigh temperature Vol. 61; no. 2; pp. 178 - 184
Main Author Belyakov, M. Yu
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2023
Springer Nature B.V
Subjects
Atoms and Molecules in Strong Fields
Binary mixtures
Classical and Continuum Physics
Critical point
Equations of state
Industrial Chemistry/Chemical Engineering
Laser Matter Interaction
Materials Science
Phase diagrams
Physical Chemistry
Physics
Physics and Astronomy
Pressure dependence
Thermophysical properties
Thermophysical Properties of Materials
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Summary:The study examines the behavior of a binary mixture in the vicinity of the liquid–vapor critical point. It is shown that the pressure dependence on density along the critical isotherm, predicted within the framework of the existing theory of critical phenomena, does not match the shape of the dew-bubble curves. The problem is analyzed with the equation of state for a multicomponent near-critical mixture, adapted to describe thermophysical properties of a binary mixture. To eliminate the problem it is proposed to impose an additional condition on the equation of state coefficient. Possible consequences of imposing such a condition are considered.
ISSN:0018-151X
1608-3156
DOI:10.1134/S0018151X23020025