What is the efficiency of an heat engine working in the temperature ranges 25oC and 225oC ?

28.6% 49.25% 40% 19.19%

40%

Efficiency of heat engine : \(\eta = (1 - \frac{T_2}{T_1})\) T2 : Sink Temperature = 25oC = 298 K ; T1 : Source Temperature = 225oC = 498 K ; \(\eta = (1 - \frac{298}{498})\) \(\eta = 40.1%\)