A Carnot heat engine operates with TC = 300 K. The heat engine produces 20 kJ/s of work and releases 25 kJ/s of heat to the low temperature reservoir. What is the temperature of the high temperature reservoir?
A. The described heat engine is impossible.
B. 360 K
C. 60 K
D. 540 K
E. Insufficient information to solve
A. Incorrect. It is possible to design a valid heat engine to these specifications.
B. Incorrect. Go back to the start and carefully review your work, especially your signs.
C. Incorrect. You are making a sign error early in your calculations. You should also have noticed that the “high” temperature you calculated was lower than that of the low temperature reservoir.
D. Correct.
E. Incorrect. All required information is present. Review Example 4-12 for ideas.
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