Which limitation is imposed on a Carnot engine when operating with a finite-sized hot reservoir?

💡 Explanation

When sourcing heat from a finite hot reservoir, the reservoir temperature progressively decreases due to the heat extraction process inherent within the Carnot cycle's operation, impairing thermal input. Therefore, a decreasing reservoir temperature causes efficiency to decline, rather than increasing work, negating compression or inducing instability which result from other factors.

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