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← ScienceFor 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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