Question
Carnot engine takes 90 cal of heat from the reservoir at temperature 540K. Engine performs 126J of work. To increase the engine performance to 150J, to what temperature the hot reservoir should be raised?
Solution
Given, 
Heat released, 
Since,
∴ 
Let at temperature 
the engine's performance be 150J.
Thus,
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and 
Now 
The hot reservoir should be raised to a temperature of 596.84 K.
