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  4. 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

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Q. A carnot engine takes $3 × 10^6$ 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

AIEEEAIEEE 2003Thermodynamics

Solution:

Work done by the engine while taking heat
$Q = 3 × 10^6$ cal is $W = 2 × 10^6 × 4.2 = 8.4 × 10^6 \,J.$