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25. A Carnot engine takes

3×106 cal. of heat from a reservoir at 627°C, and gives it to a sink at 27°C. The work done by the engine is

(a) 4.2×106 J                             (b) 8.4×106 J    

(c) 16.8×106 J                           (d)  Zero

Answer-b

(7)

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