What is the efficiency of a heat engine if during its cycle the heat engine receives

What is the efficiency of a heat engine if during its cycle the heat engine receives from heating an amount of heat equal to 100 J and performs useful work equal to 25 J

These tasks: Q (the amount of heat that the heat engine under consideration receives per cycle from the heater) = 100 J; A (the work that the heat engine under consideration performs per cycle) = 25 J.

The efficiency value is determined by the formula: η = A / Q.

Let’s make calculations: η = 25/100 = 0.25 or 25%.

Answer: The efficiency of the heat engine under consideration is 25%.