Bubble point pressures for the binary mixture of pentafluoroethane (HFC-125) with chloropentafluoroethane (CFC-115) were measured at the temperature ranges from (243.15 to 333.15) K using a static apparatus. The uncertainties of measurements were estimated to be less than 20 mK in temperature, 1.2 kPa in pressure, and 0.001 in liquid-phase mole fraction. The experimental data were correlated with the Peng-Robinson equation of state with van der Waals mixing rules. The correlation results have a good agreement with the experimental results. The overall average absolute deviation was 0.36 % between measured pressures and calculated results from the Peng-Robinson (PR) equation of state. The interaction parameter k(12) was obtained for different temperatures, and the relationship between k(12) and the temperature was correlated with the deviation of +/- 0.5 %. The azeotropic compositions and pressures at specified temperatures were calculated.