An engine takes in 150 J energy from a 400 K thermal source.If the engine discharges energy into a thermal reservoir at 150K,then what is the maximum amount of work one can get out of the engine?
A) 93.8 J
B) 84.2 J
C) 28.5 J
D) 168 J

Question

Quizplus · Accepted Answer

The maximum work is determined by the Carnot efficiency, which is 1 - (Tc/Th) = 1 - (150/400) = 0.625. The maximum work is 0.625 * 150 J = 93.75 J, approximately 93.8 J.

An Engine Takes in 150 J Energy from a 400