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Which limitation arises when a reversible heat engine cycle operates between two finite thermal reservoirs?

A)Cycle irreversibility dominates efficiency gain
B)Reservoir temperature decreases limiting work
C)Entropy accumulation impairs overall performance
D)Refrigerant degradation reduces heat transfer

💡 Explanation

When a reversible heat engine cycle operates drawing heat from a finite reservoir, reservoir’s temperature decreases throughout the process because energy conservation demands that the heat removed reduces internal energy. Therefore work output wanes, rather than irreversibility dominance, increased entropy, or refrigerant degradation, that require different constraints.

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