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For an ideal heat engine ,the temperature of the source is 1270C. In order to have 60% efficiency the temperature of the sink should be _________ 0C (Round off to the Nearest Integer)

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answer is -113.

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Detailed Solution

η=1−T2T1⇒0.6=1−T2400⇒T2400=0.4⇒T2=160K⇒T2=160−273⇒T2=−1130C

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