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Unformatted text preview: 1 EXERCISES and EXAMPLES concerning the Kelvin-Plank and Clausius Statements of the Second Law of Thermodynamics. Example 1: heat transfer across a finite temperature difference. Use the second law of thermodynamics to show that heat transfer across a finite temperature difference is irreversible. Procedure: 1) Assume that heat transfer across a finite temperature is reversible. 2) Show that this assumption leads to a violation of the second law of thermodynamics. The following configuration is not a violation of the second law. Heat transfer flows Q H directly from the hot thermal reservoir to the cold thermal reservoir. Assume that the heat transfer from hot to cold thermal reservoir, Q H , is reversible and reverse the heat flow. Q H Cold thermal reservoir at T C Hot thermal reservoir at T H Q H Q C W N HEAT ENGINE Q H Cold thermal reservoir at T C Hot thermal reservoir at T H Q H Q C W N HEAT ENGINE 2 Let the reversed heat flow go directly to the heat engine, bypassing the hot thermal...
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This note was uploaded on 07/21/2011 for the course EML 3100 taught by Professor Staff during the Summer '10 term at FSU.
- Summer '10
- Heat Transfer