A heat engine operates between a hot reservoir at 1500 K and a cold reservoir at 500 K.During each cycle,1.0 × 10⁵ J of heat is removed from the hot reservoir and 5.0 × 10⁴ J of work is performed.
-Determine the Carnot efficiency of this engine.

Question

Quizplus · Accepted Answer

The Carnot efficiency is given by the formula:
η = (1 - Tc/Th)
where η is the Carnot efficiency, Tc is the temperature of the cold reservoir, and Th is the temperature of the hot reservoir. 
Substituting the given values, we get:
η = (1 - 500/1500)
η = 0.67
Therefore, the Carnot efficiency of the engine is 0.67. The best choice is D.

A Heat Engine Operates Between a Hot Reservoir at 1500