Isothermal vapor−liquid equilibrium data for the binary system difluoroethane (HFC-32) + pentafluoroethane(HFC-125) were measured at temperatures from (265.15 to 303.15) K by the circulating method in this work.The vapor−liquid equilibrium data were correlated by the Peng−Robinson equation of state combined with alinear combination of the Vidal and Michelsen mixing rule and nonrandom two-liquid model. The results revealthat the correlated data are in a good agreement with the experimental values.