What work does a heat engine with an efficiency of 11% do if it receives 7200 kJ of heat from the heater?

The efficiency of a heat engine can be calculated using the formula:
η = A / Q, η is the efficiency of the heat engine (η = 11% = 0.11), A is the perfect work of the heat engine (J), Q is the energy received from the heater (Q = 7200 kJ = 7200 * 10 ^ 3 J ).
Let us express and calculate the work done by the heat engine:
A = η * Q = 0.11 * 7200 * 10 ^ 3 = 79.2 * 10 ^ 3 J = 79.2 kJ.
Answer: The work performed by a heat engine is 79.2 kJ.