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Which outcome occurs within a Carnot refrigerator operating irreversibly?

A)Reduced coefficient of performance
B)Isothermal process remains unchanged
C)Adiabatic expansion achieves greater cooling
D)Entropy decrease in the thermal reservoir

💡 Explanation

Reduced coefficient of performance is expected because real-world irreversibilities increase entropy generation in the working fluid, thus lessening the cooling achieved for a given work input. Therefore, the COP is lower rather than higher because heat is not as efficiently transferred in irreversible operation.

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