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The specific heat at constant pressure i...

The specific heat at constant pressure is greater than that for the same gas at constant volume because

A

At constant pressure work is done in expanding the gas

B

At constant volume work is done in expanding the gas

C

The molecular attraction increases more at constant pressure

D

The molecular vibration increases more at constant pressure

Text Solution

Verified by Experts

The correct Answer is:
A
As P = constant
`C_P=(DeltaQ)/(DeltaT)=(DeltaU)/(DeltaT)+(DeltaW)/(T)`
and for `C_V=`, V= constant
`C_V=(DeltaQ)/(DeltaT)=(DeltaU)/(DeltaT)`
Hence, `C_P gt C_V`
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