In a maximally efficient heat engine, the amount of entropy that the hot reservoir loses as heat flows out of it is exactly balanced by the entropy that the cold reservoir gains as the waste heat flows into it.

Question

Quizplus · Accepted Answer

In a maximally efficient (reversible) heat engine, the process is isentropic, meaning the total entropy change of the system (including both the hot and cold reservoirs) is zero. This implies that the entropy lost by the hot reservoir is exactly equal to the entropy gained by the cold reservoir.

In a Maximally Efficient Heat Engine, the Amount of Entropy