Question

A steam engine takes in superheated steam at 270 degree Celsius, and discharges condensed steam from its cylinder at 50 degree Celsius. The engine takes 50 kJ heat from the hot steam per cycle and does 15 kJ of work per cycle. (a) Whats the efficiency of the engine? (b) If someone claims that 60 kJ heat were taken in per cycle by another engine operating at these same temperatures and the engine can generate 30kJ work per cycle, do you believe it? Show your proof.

Answer 1