Heat engines: A certain engine extracts 1300 J of heat from a hot temperature reservoir and discharges 700 J 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 1300 J - 700 J = 600 J. Therefore, the efficiency is (600 J / 1300 J) * 100% = 46%.

Heat Engines: a Certain Engine Extracts 1300 J of Heat