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A monoatomic ideal gas is supplied the heat Q very slowly keeping the pressure constant. Then work done by the gas will be

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a
3Q5
b
2Q5
c
Q3
d
5Q7

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detailed solution

Correct option is B

CP=5R2  and CV=3R2∴  ΔUQ=n.CV.ΔTn.CP.ΔT=35⇒ΔU=3Q5∴  W=Q−ΔU=Q−3Q5=2Q5


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