An engine takes in 600 J of heat from the high temperature reservoir and exhausts 400 J to the low temperature reservoir.What is the efficiency of this engine?

Question

Quizplus · Accepted Answer

Efficiency of the engine can be calculated as:
Efficiency = (Work obtained from the engine/Heat added to the engine)
Work obtained from the engine = Heat added - Heat exhausted = 600 J - 400 J = 200 J.
Heat added = 600 J
Therefore, Efficiency = (200/600) x 100% = 33.3%.
Hence, choice B is correct.

An Engine Takes in 600 J of Heat from the High