With increase in the volume of a closed system the saturation pressure at the given temperature remains same.
You might be familiar with the ideal gas equation from Chemistry, which relates the pressure and volume of an ideal gas with temperature as: PV = nRT, where nR is a constant. You are given a closed metal container of volume V, filled with a gas kept at a temperature T, and pressure P. If γ is the coefficient of volume expansion for the gas, what is the pressure after the temperature is increased by ΔT?