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Journal of Thermodynamics
Volume 2011 (2011), Article ID 945047, 7 pages
Research Article

Corollary from the Exact Expression for Enthalpy of Vaporization

Department of Physics and Chemistry of New Materials, A. M. Prokhorov Academy of Engineering Sciences, 19 Presnensky Val, Moscow 123557, Russia

Received 14 November 2010; Revised 9 March 2011; Accepted 16 March 2011

Academic Editor: K. A. Antonopoulos

Copyright © 2011 A. A. Sobko. 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.


A problem on determining effective volumes for atoms and molecules becomes actual due to rapidly developing nanotechnologies. In the present study an exact expression for enthalpy of vaporization is obtained, from which an exact expression is derived for effective volumes of atoms and molecules, and under certain assumptions on the form of an atom (molecule) it is possible to find their linear dimensions. The accuracy is only determined by the accuracy of measurements of thermodynamic parameters at the critical point.