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Q.

The temperature of the sink of a Carnot engine is 27°C. If the efficiency of the engine is 25%, the temperature of the source is

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a

227°C

b

327°C

c

127°C

d

27°C

answer is C.

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Detailed Solution

25=    1−300T1100=100T1−30000T1    25T1=100T1−30000    75T1=3000 or T1=400K∴    T1=400−273=127∘C
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The temperature of the sink of a Carnot engine is 27°C. If the efficiency of the engine is 25%, the temperature of the source is