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Which risk increases during a Carnot engine cycle?

A)Heat transfer to cold reservoir
B)System irreversibility approaches zero
C)Engine approaches maximum efficiency
D)Entropy transferred equals energy transferred

💡 Explanation

Heat transfer to a cold reservoir must occur during the Carnot cycle to complete it; the mechanism describes heat expulsion to lower temperature. Therefore, heat transfer is required, rather than a theoretical 'zero' transfer, because isothermal compression demands waste heat rejection.

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