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 gas is

During an adiabatic process, the pressure of a gas is found to be prop

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 gas is
Answer» `4//3` 2 `5//3` `3//2` Solution :As `P prop T^(3)` or `(P)/(T^(3))` = CONSTANT or `PT^(-3)` = constant For an adiabatic CHANGE, `PT^((GAMMA)/(1-gamma))` = constant `:. (gamma)/(1-gamma) = -3` or `-3+3 gamma = gamma` or `2gamma =3` or `gamma = (3)/(2)`