A property of each phase in a mixture that is independent of the amount of material. It includes temperature, pressure, enthalpy, density, specific volume, specific heat capacity at constant volume, and mole fraction. For a multiphase mixture at equilibrium, both temperature and pressure are uniform throughout the mixture but the values for enthalpy and mole fraction are different for each phase. An extensive variable depends on the amount of material in the system such as volume, mass, and total energy.