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  Home > JCE Print > Journal of Chemical Education > Issues > 1996  > August  >
General Interest
Entropy Diagrams
Norman C. Craig
Oberlin College, Oberlin, OH 44074
Cover
August 1996
Vol. 73 No. 8
p. 710
Abstract
New displays, called entropy diagrams, show graphically how entropy changes compete in physicochemical processes. Examples of entropy diagrams are given for an equilibrium vaporization, a spontaneous evaporation into a vacuum, a vapor-pressure lowering due to the presence of an involatile solute, a chemical reaction under standard-state conditions and at equilibrium, an osmotic equilibrium, and an electrochemical equilibrium in a galvanic cell. On these diagrams entropy contributions due to standard-state changes, dilutions, and energy exchanges with thermal reservoirs are shown algebraically as well as diagrammatically. Entropy diagrams are useful for illustrating entropy analyses in which all transformations of matter and energy are related to entropy effects.
More Information
*  Citation
 Craig, Norman C. J. Chem. Educ. 1996 73 710.
*  Keywords
*  History
 Created:
Last Updated:		 9/23/1999
5/22/2006
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