Entropy Diagrams
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Norman C. Craig [1]
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[1] Oberlin College
Oberlin College
City of Oberlin, Estados Unidos
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- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 73, Nº 8 (August), 1996, págs. 710-715
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
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.
