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
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a