What is the efficiency of an heat engine working in the temperature ranges 25oC and 225oC ?
Answer & explanation
Correct answer: option 3
Efficiency of heat engine : \(\eta = (1 - \frac{T_2}{T_1})\)
T2 : Sink Temperature = 25oC = 298 K ;
T1 : Source Temperature = 225oC = 498 K ;
\(\eta = (1 - \frac{298}{498})\)
\(\eta = 40.1%\)