Table of Contents
Journal of Thermodynamics
Volume 2012, Article ID 859047, 13 pages
Research Article

Equilibrium Molecular Interactions in Pure Gases

The Information Systems and Computer Technologies Department, Russian New University, Radio St. 22, Moscow 105005, Russia

Received 3 September 2011; Revised 13 November 2011; Accepted 21 November 2011

Academic Editor: Juan Ortega

Copyright © 2012 Boris I. Sedunov. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The equilibrium molecular interactions in pure real gases are investigated based on the chemical thermodynamics principles. The parallels between clusters in real gases and chemical compounds in equilibrium media have been used to improve understanding of the real gas structure. A new approach to the equilibrium constants for the cluster fractions and new methods to compute them and their significant parameters from the experimental thermophysical data are developed. These methods have been applied to some real gases, such as Argon and Water vapors and gaseous Alkanes. It is shown that the four-particle clusters make a noticeable contribution in the thermophysical properties of the equilibrium Water vapor. It is shown also that the effective bond energy for dimers in Alkanes linearly grows with the number of carbon atoms in the molecule.