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  Home > JCE Print > Journal of Chemical Education > Issues > 1996  > May  >
Symposium: A Controversy about the Gibbs Function
Applications of the Gibbs Function to Chemical Systems and Subsystems
Richard M. Noyes
University of Oregon, Eugene, OR 97403-1253
Cover
May 1996
Vol. 73 No. 5
p. 404
Abstract
The Gibbs Function, G, cannot even be defined except for a system such that the temperature, T, and pressure, P, are uniform. Any systems for which G is calculated must consist only of regions of fluid, or else any regions of solid must be totally isotropic. For any change of state, T and P must also be the same for both the initial and final states. Therefore, it is not possible to calculate Delta G for the change of state in the Bates-Tykodi System which includes a container which is a strained solid. Willard Gibbs himself recognized this constraint of uniform pressure when he first presented the function which now bears his name, but many subsequent textbooks have overlooked it.
More Information
*  Citation
 Noyes, Richard M. J. Chem. Educ. 1996 73 404.
*  Keywords
*  History
 Created:
Last Updated:		 9/23/1999
5/22/2006
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