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 $ 411^{o}C $ and $ 69^{o}C $ 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:
$ \eta =1-\frac{T _{2}}{T _{1}}=1-\frac{(273+69)}{(273+411)}=0.5 $
Therefore Work done$ =\eta \times Q=0.5\times 1000=500J $
