College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

Exercise 78

A Carnot engine takes in heat from a reservoir at 350 °C and has an efficiency of 35%. The exhaust temperature is not changed and the efficiency is increased to 40%. (a) The temperature of the hot reservoir is (1) lower than (2) equal to, (3) higher than 350 °C. Explain. (b) What is the new Celsius temperature of the hot reservoir