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Questions  

A Carnot engine operates with source at 127 °C and sink at 27 °C. If the source supplies 40 k J of heat energy, the work done by the engine is :

a
30 kJ
b
10 kJ
c
4 kJ
d
1 kJ

detailed solution

Correct option is B

η=1-T2T1=WQ1⇒1-300400=W40⇒W= 10 kJ

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