%0 Journal Article %1 kaplun2007calculation %A Kaplun, A.B. %A Meshalkin, A.B. %D 2007 %I Nauka/Interperiodica %J Journal of Engineering Thermophysics %K 2007 meta-stable properties thermodynamic %N 4 %P 259-269 %R 10.1134/S1810232807040078 %T Calculation of thermodynamic properties of substances in metastable and labile regions of real gas states %U http://dx.doi.org/10.1134/S1810232807040078 %V 16 %X Questions related to the concepts of the equilibrium and stability of a thermodynamic system are considered. Metastable states are defined as fully equilibrium but relatively unstable states. A preferable structure of the equation of state (ES) of a single-component substance has been determined. Equations for the second virial coefficient and ES of a real gas describing the thermodynamic characteristics in a wide range of state parameters within the limits of the error in experimental data have been obtained. This was done with the help of a combined spherically symmetric potential of interaction. With the use of rigorous equations of thermodynamics, it has been found that the isochoric heat capacity in the metastable and labile regions of states remains finite and positive (with the exception of the critical point). It has been shown that, at the transition from the stable region to the region of metastable and labile states, some thermodynamic characteristics such as the isochoric heat capacity, internal energy, enthalpy, and entropy do not have any singularities. Some examples of calculation of these characteristics in the stable, metastable, and labile regions with the help of equations presented by the authors are given. They confirm the validity of the analysis performed in this paper.

@article{kaplun2007calculation, abstract = {Questions related to the concepts of the equilibrium and stability of a thermodynamic system are considered. Metastable states are defined as fully equilibrium but relatively unstable states. A preferable structure of the equation of state (ES) of a single-component substance has been determined. Equations for the second virial coefficient and ES of a real gas describing the thermodynamic characteristics in a wide range of state parameters within the limits of the error in experimental data have been obtained. This was done with the help of a combined spherically symmetric potential of interaction. With the use of rigorous equations of thermodynamics, it has been found that the isochoric heat capacity in the metastable and labile regions of states remains finite and positive (with the exception of the critical point). It has been shown that, at the transition from the stable region to the region of metastable and labile states, some thermodynamic characteristics such as the isochoric heat capacity, internal energy, enthalpy, and entropy do not have any singularities. Some examples of calculation of these characteristics in the stable, metastable, and labile regions with the help of equations presented by the authors are given. They confirm the validity of the analysis performed in this paper.}, added-at = {2015-12-02T14:58:07.000+0100}, author = {Kaplun, A.B. and Meshalkin, A.B.}, biburl = {https://www.bibsonomy.org/bibtex/2dfaa5eaccb37ea539e175a2529a84977/thorade}, description = {Calculation of thermodynamic properties of substances in metastable and labile regions of real gas states - Springer}, doi = {10.1134/S1810232807040078}, interhash = {660b63232a8ae4121bfe348fd3b1b2f9}, intrahash = {dfaa5eaccb37ea539e175a2529a84977}, issn = {1810-2328}, journal = {Journal of Engineering Thermophysics}, keywords = {2007 meta-stable properties thermodynamic}, language = {English}, number = 4, pages = {259-269}, publisher = {Nauka/Interperiodica}, timestamp = {2015-12-02T14:58:07.000+0100}, title = {Calculation of thermodynamic properties of substances in metastable and labile regions of real gas states}, url = {http://dx.doi.org/10.1134/S1810232807040078}, volume = 16, year = 2007 }