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Why—other than the fact that the second law of

Chapter 15, Problem 19

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QUESTION:

Problem 19CQ

Why—other than the fact that the second law of thermodynamics says reversible engines are the most efficient—should heat engines employing reversible processes be more efficient than those employing irreversible processes? Consider that dissipative mechanisms are one cause of irreversibility.

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QUESTION:

Problem 19CQ

Why—other than the fact that the second law of thermodynamics says reversible engines are the most efficient—should heat engines employing reversible processes be more efficient than those employing irreversible processes? Consider that dissipative mechanisms are one cause of irreversibility.

ANSWER:

Solution  19CQ

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According to the second law of thermodynamics, reversible engines are said to be more efficient than irreversible ones working between the same temperature ranges. An explanation for this phenomenon is to be made.

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