Measurements of Vapor Pressures and PVT Properties of Heptafluoropropyl Methyl Ether

Vapor pressures and PVT properties of heptafluoropropyl methyl ether (CF3CF2CF2OCH3, HFE-347mcc) have been measured at temperatures from 340 K to the critical temperature (437.7 K) and from (370 to 450) K along eight isochores, respectively. An isochoric cell apparatus was used in the present measurements with uncertainties estimated to be ±10 mK, ±2 kPa, and ±0.2 kg·m-3 in temperature, pressure, and density, respectively. A vapor pressure correlation developed on the basis of the measured vapor pressures in addition to the other available data shows a satisfactory representation of the present data within ±2 kPa. Comparison of the measured PVT properties with the reported equation of state also shows a satisfactory agreement for engineering application within ±1% in pressure and ±2.2% in density.