Answer:
The work done by the engine is 50 J.
Explanation:
Given;
amount of heat energy added to the heat engine, Q = 75 J
energy lost in the process, E = 50 J
let the work done by the engine (system) = W
Apply the first law of thermodynamic;
ΔU = Q - W
where;
ΔU is change in internal energy = 75 J - 50 J = 25 J
25 = 75 - W
25 - 75 = - W
-50 J = - W
W = 50 J
Therefore, the work done by the engine is 50 J.
