ef152-lec-6-3 - Module 6, Lecture 3: Entropy Entropy 2nd...

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EF 152 Spring, 2009 Lecture 6-3 1 Module 6, Lecture 3: Entropy EF 152 Spring, 2009 Lecture 6-3 2 Entropy ± 2 nd law different from many physical laws ± Not an equation or quantitative relationship ± Statement of ________________ ± Entropy is a measure of ___________ ± Add heat dQ and let gas expand just enough to keep temperature constant ± Since internal energy depends only on temperature, internal energy is ___________ ± From 1 st law, ____ = ____ () dV V nRT dV p dW dQ = = = nRT dQ V dV = EF 152 Spring, 2009 Lecture 6-3 3 Entropy ± dV/V is a measure of the increase in disorder ± is proportional to dQ/T ± Symbol for entropy is ____ ± dS = ± Units of entropy are __________ ± For a reversible isothermal process T Q S S S = = Δ 1 2 nRT dQ V dV = EF 152 Spring, 2009 Lecture 6-3 4 Example: Melting Ice Given: One kilogram of ice at 0°C is melted and converted to water at 0°C Required: Change in entropy L f = 79.6 cal/g for ice
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EF 152 Spring, 2009 Lecture 6-3 5
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This note was uploaded on 04/07/2009 for the course EF 152 taught by Professor Ab during the Spring '08 term at University of Tennessee.

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ef152-lec-6-3 - Module 6, Lecture 3: Entropy Entropy 2nd...

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