The method of calculation of saturated liquid density

based on the Hansons method

has been proved theoretically from Haggenmachers equation of state. A critical compressibility has been used as a parameter for dividing the compounds into groups to overcome the defeat of Hansons method. The error of Saturated liquid density

calculated by this method

was within 1%. In this paper

a method for calculation of Saturated vapor densities and mixture liquid densities and a generalized equation of heat of vapolyzation was also given. These results proved that the theorem of corresponding state

could be applied to two phases region.