Heat and Thermodynamics

Solved Problems

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           

or           0.4T₁ = T₁ − 300

 

or           0.6T₁ = 300

 

or           T₁ = 500K

Again,      

or           0.6T − 300      or        0.4T = 300, T = 750 °k