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GEORGE L. GILBERT Denison University Granville. Ohio 43023
Lecture Table Experimental Demonstration of Entropy Submitted by: Checked by:
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The work of the author at Baylor University is supported by income from the Chair in Chemistrv endowed bv.a eift . from The Robert A. Welch Foundation. 'See Flor)., P. .I., "Prinrlples of Polymer Chernlstry." ('mnell University l'rrri, Ithaca, N.Y., 1953, p. 435. Laswiok, P. H., d. Chrrn. Edur., 49,469 t19721. 754 1 Journal of Chemical Education
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Malcolm Dole Baylor University Waeo, Texas 76073 Allan R. Burkett Dillard Uniuersity New Orleans, Louisiana
Entropy and other thermodynamic functions are usually taught using the perfect gasas the ideal medium to illustrate changes in U, the internal energy, A and G, the Helmholtzand Gibbs free energies, and S,the entropy of the system under consideration. I have found that it is extremely helpful to the student to use nut only the perfect gas as the medium under studv. .. hut also the rubber band. T h r rubber\, or the elaito- - - ~ ~ merit state is an important part of our environment as evervone who drives an automobile or who uses intimate wearine apparel knows Furthermore lust as the perfect gai has th; deal DroDertv of U beme indetwndent of volume at constant temp&a
