Q 1. A Carnot's engine whose low temperature reservoir is at 27 °C has an efficiency of 40%. What should be the temperature of high temperature reservoir? What should be the temperature of the latter if the efficiency is to be raised to 60%?
Ans. We know that
or 0.4T1 = T1 − 300
or 0.6T1 = 300
or T1 = 500K
or 0.6T − 300 or 0.4T = 300, T = 750 °k