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Graph of specific heat at constant volum...

Graph of specific heat at constant volume for a monoatomic gas is ____

A

B

C

D

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Verified by Experts

The correct Answer is:
C
According to first law of thermodynamics ,
`DeltaQ=DeltaU+PDeltaV`
If `DeltaQ` is absorbed heat at constant volume `DeltaV=0`
`therefore C_V=((DeltaQ)/(DeltaT))V=((DeltaU)/(DeltaT))V=(DeltaU)/(DeltaT)`
For an ideal monoatomic gas,
`(DeltaU)/(DeltaT)=3/2 R, C_V=3/2R`
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