The efficiency of a Carnot engine operating between 95°C and 0°C is most nearly:

A) 13%.
B) 52%.
C) 26%.
D) 80%.
E) 9%.

Question

The efficiency of a Carnot engine operating between 95°C and 0°C is most nearly:
​
A) 13%.
B) 52%.
C) 26%.
D) 80%.
E) ​9%.

Quizplus · Accepted Answer

The efficiency of a Carnot engine is given by the formula: efficiency = 1 - Tc/Th, where Tc is the temperature of the cold reservoir and Th is the temperature of the hot reservoir. Plugging in values, we get efficiency = 1 - (273+0)/(273+95) = 26%. Therefore, the answer is (C).

The Efficiency of a Carnot Engine Operating Between 95°C and 0°C