An engine exhausts 600 J of of heat to the cold temperature reservoir and has an efficiency of 25%.How much heat does it take in from the high temperature reservoir?

Question

Quizplus · Accepted Answer

The efficiency of an engine is given by the formula efficiency = (work output / heat input) * 100%. Given an efficiency of 25%, and knowing that the work output equals the heat input minus the heat exhausted (600 J), we can rearrange the formula to solve for the heat input: heat input = work output / efficiency. Since the work output is the difference between the heat input and the heat exhausted, we can set up the equation: heat input - 600 J = 0.25 * heat input. Solving for heat input gives us 800 J.

An Engine Exhausts 600 J of Of Heat to the Cold