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Advanced Thermodynamics for Engineers, 2nd Edition
book

Advanced Thermodynamics for Engineers, 2nd Edition

by Ali Turan, D. Winterbone
February 2015
Intermediate to advanced content levelIntermediate to advanced
578 pages
19h 27m
English
Butterworth-Heinemann
Content preview from Advanced Thermodynamics for Engineers, 2nd Edition
mechanical system s, is to consider the two blocks of metal to be in equilibrium and for heat transfer to
occur spontaneously (and reversibly) between one and the other. Assume the temperature change in
each block is dT, with one temperature increasing and the other decreasing, and the heat transfer is dQ.
Then the change of entropy, dS, is given by
dS ¼
dQ
T þ dT
dQ
T dT
¼
dQ
ðT þ dTÞðT dTÞ
ðT dT T dTÞ
¼
dQ
T
2
þ dT
2
ð2dTÞz 2dQ
dT
T
2
(2.19)
This means that the entropy of the system would have decreased. Hence maximum entropy is
obtained when the two blocks are in equilibrium and are at the same temperature. The general criterion
of equilibrium according ...
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Publisher Resources

ISBN: 9780444633736