A certain heat engine extracts 1.30 kJ of heat from a hot temperature reservoir and discharges 0.70 kJ of heat to a cold temperature reservoir.What is the efficiency of this engine?
A)46%
B)54%
C)86%
D)27%
E)13%

Question

Quizplus · Accepted Answer

The efficiency of a heat engine is calculated using the formula: Efficiency = (Work output / Heat input) * 100%. The work output is the difference between the heat extracted from the hot reservoir and the heat discharged to the cold reservoir, which is 1.30 kJ - 0.70 kJ = 0.60 kJ. Therefore, the efficiency is (0.60 kJ / 1.30 kJ) * 100% = 46%.

A Certain Heat Engine Extracts 1