1.

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio C_P//C_V for the gas is

Answer»

<P>`3/2`
`4/3`
2
`5/3`

Solution :The EQUATION of ADIABATIC CHANGE is
`P_V^(gamma)` = constant which gives
`P^(1-gamma)T^(gamma)` = constant
`P^(1-gamma)alpha1/T^gamma" or " P alphaT(gamma/(gamma-1))`
As`p alpha T^3:. gamma/(gamma-1)=3 " or " gamma=3/2`
Hence `C_P/C_V = =gamma=3/2`


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