Certain amount of mono atomic gas is expanded isobarically from 20oC to 200oC and amount of heat supplied to the gas is ‘Q’. Then work done by the gas is
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a
2Q5
b
3Q5
c
Q5
d
4Q5
answer is A.
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Detailed Solution
Q=n.Cp.∆T and ∆U=n.Cv.∆T∴∆UQ=CvCp=1γFor monoatomic gas, γ=3+23=53∴∆U=Q5/3=3Q5∴W=Q-∆U=Q-3Q5=2Q5