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For a Carnot engine operating with ammonia, which outcome occurs with decreased condenser cooling?

A)Lower thermal efficiency reduces output
B)Increased ammonia liquid subcooling occurs
C)Greater work output is always exhibited
D)Volumetric expansion efficiency increases greatly

💡 Explanation

Lower condenser cooling raises the cold reservoir temperature, so the Carnot cycle's efficiency declines according to its formula: η = 1 - (Tc/Th). Thus, the engine’s thermal efficiency decreases and its work output drops, because less thermal energy converts to work, rather than increasing.

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