The efficiency of an ideal heat engine working between the freezing point and boiling point of water

Question

The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is

Professor PC Thomas Classes · Answer

$\eta = 1 - \frac{T_C}{T_H} = 1 - \frac{273}{373} = \frac{100}{373} \approx 26.8\%$.