June 2016 (published: 06.06.2016)
Number 2(22)
Home > Issue > Method of construction in a variable pressure and temperature single equation of state satisfying the scaling hypothesis
Rykov V.A., Shelamov A.A., Dushin V.V.
The method of construction of a single equation of state, which independent state parameters are pressure and temperature. It is shown that the developed equation of state describes not only the regular part of the thermodynamic surface, but also its near-critical point region in accordance with the requirements of the scale theory of critical phenomena. Refined structure of thermodynamic surfaces near the critical point and shows the dependence of the critical indices of the thermodynamic functions of the direction of approach to the critical point. Under the proposed approach to description of thermodynamic surfaces is based on the limit transition in ideallocation condition, equation clayperon-Clausius, Planck rules-Gibbs, as well as correctly transferred, the temperature dependence of the second virial coefficient.
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Keywords: equation of state, pressure, density, temperature, critical indices, critical point.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
UDC 536.71
Method of construction in a variable pressure and temperature single equation of state satisfying the scaling hypothesis
The method of construction of a single equation of state, which independent state parameters are pressure and temperature. It is shown that the developed equation of state describes not only the regular part of the thermodynamic surface, but also its near-critical point region in accordance with the requirements of the scale theory of critical phenomena. Refined structure of thermodynamic surfaces near the critical point and shows the dependence of the critical indices of the thermodynamic functions of the direction of approach to the critical point. Under the proposed approach to description of thermodynamic surfaces is based on the limit transition in ideallocation condition, equation clayperon-Clausius, Planck rules-Gibbs, as well as correctly transferred, the temperature dependence of the second virial coefficient.
Read the full article
Keywords: equation of state, pressure, density, temperature, critical indices, critical point.
DOI 10.17586/2310-1148-2016-9-2-28-35