For an ideal gas, the correct relation is .

For two mole of an ideal gas, the correct relation is :

For a fixed mass of an ideal gas the correct representation is

For an ideal gas, the heat of reaction at constant pressure and constant volume are related as

For an ideal gas, the heat of reaction at constant pressure and constant volume are related as

For adiabatic reversible expansion of an ideal gas the expression relating pressure and volume of the gas is -

For adiabatic reversible expansion of an ideal gas the expression relating pressure and volume of the gas is -