Thermodynamics Question 165

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

[AIEEE 2003]

Options:

A) 4.2×106J

B) 8.4×106J

C) 16.8×106J

D) Zero

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Answer:

Correct Answer: B

Solution:

η=1T2T1=WQ

Therefore W=(1T1T2) Q=1(273+27)(273+627)

Therefore W=(1300900)×3×106

=2×106×4.2 J=8.4×106J



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