Bubble point pressure of the binary mixture of propane (C3H8) and pentafluoroethane (CHF2CF3) were measured by an acoustic absorption technique. The measurements were carried out in a wide temperature range of 243.15-333.15 K with an uncertainty within +/-20kPa except those in the propane rich and high temperature regions, which showed the strong absorption of acoustic wave. For (1 - x)C3H8 + xCHF(2)CF(3), the bubble point pressures increase sharply at first with increasing composition, x and then decrease indicating a convex curve through a small peak around x = 0.65 corresponding to the azeotrope in the whole temperatures. The results were correlated by the Peng-Robinson (PR) equation of state including the azeotropic point. (C) 2003 Elsevier B.V. All rights reserved.