Efficiency of Carnot heat engine is given by η=1−
T2
T1
=1−
Q2
Q1
=
W
Q1
.....(i) where. W= net work done by the gas Q1= heat absorbed by the gas, Q2= heat released by the gas, T1= temperature of hot reservoir, and T2= temperature of cold reservoir. Using Eq. (i), we can write 1−