Thermodynamics Question 154

Question: A Carnot’s engine used first an ideal monoatomic gas then an ideal diatomic gas. If the source and sink temperature are 411oC and 69oC respectively and the engine extracts 1000 J of heat in each cycle, then area enclosed by the PV diagram is

[Pb. PET 2002]

Options:

A) 100 J

B) 300 J

C) 500 J

D) 700 J

Show Answer

Answer:

Correct Answer: C

Solution:

η=1T2T1=1(273+69)(273+411)=0.5

Therefore Work done=η×Q=0.5×1000=500J



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