State that the coefficient of cubical ecpansion of an ideal gas at constant pressure is equal to the reciprocal of its absolute temperature .

Explanation

Coefficient of cubical exapansion of an ideal gas at constant pressure
`PV = n RT`
At constant pressure
`Pdelta V = nRT`
`(2) :- (1)`
`(Delta V)/(V ) = (Delta T)/(T ) ` (or) `(Delta V)/(V Delta T) = (1)/(T ) rArr gamma = (1)/(T)`
`[ :. , (Delta V)/(V Delta T ) = gamma]`
For an ideal gas the coefficient of volume expansion decrease with the increases in temperature .