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  Home > JCE Print > Journal of Chemical Education > Issues > 1997  > May  >
In the Classroom
Phase Separation in Binary Systems: the Possibility of Gas-Gas Equilibrium at Subcritical Conditions
Jaime Wisniak
Department of Chemistry Engineering, Ben-Gurion University of the Nagev, Beer-Sheva, Isreal 84105
Cover
May 1997
Vol. 74 No. 5
p. 546
Abstract
The possibility of gases exhibiting limited solubility under subcritical conditions is analyzed and discussed. It is shown that a binary gas mixture will always behave like a regular solution and that phase splitting is theoretically feasible whenever the condition (Pdelta12)/(RT) > 2 is fulfilled where delta12 = 2B12-B11-B22. The value of delta12 required for phase splitting to occur is extremely large so that although the phenomena is theoretically possible, it will occur rarely or at all.
More Information
*  Citation
 Wisniak, Jaime. J. Chem. Educ. 1997 74 546.
*  Keywords
 Physical Chemistry, Thermodynamics, Gases, Phase Transitions/Diagrams
*  History
 Created:
Last Updated:		 July 28, 1999
June 23, 2005
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