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Heat and Thermodynamics by Anandamoy Manna

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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   image

or           image

or           0.4T1 = T1 − 300

 

or           0.6T1 = 300

 

or           T1 = 500K

Again,      image

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

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