Vapour pressure and excess Gibbs free energy of the ternary system {x1CH3F+x2HCl+x3N2O} at temperature of 182.33K

The equilibrium pressure of ternary mixtures of {x1CH3F+x2HCl+x3N2O} covering the entire composition range has been measured at temperature of 182.33K by the static method. The system exhibits a minimum pressure for the binary {x1CH3F+x2HCl}. The molar excess Gibbs free energy has been calculated from the experimental equilibrium pressure. For the equimolar mixture GmE(x1=x2=x3=1/3)=(-297+/-20)J.mol-1. The (p,x,y) surface for the ternary system and the corresponding curves for the three constituent binary mixtures obtained from the Peng-Robinson equation of state are in agreement with the experimental data