Question 1 of 3 · Second Law, Entropy and Irreversibility · Intermediate · About 20 min
Entropy generated by direct heat transfer
A hot reservoir at transfers of heat directly to a cooler reservoir at . Compute the entropy change of each reservoir and total entropy generated. Also determine the maximum theoretical work obtainable if that same amount of heat instead entered a reversible heat engine operating between the reservoirs.
Given
Hot reservoir 650 K
Cold reservoir 295 K
Transferred heat 840 kJ
Find
Hot-reservoir entropy change
Cold-reservoir entropy change
Total entropy generated
Maximum reversible work
Assumptions
Both reservoirs remain at fixed temperatures; direct transfer has no shaft work.
Worked solution
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