Surface Tension for the 1,1,1-Trifluoroethane (R-143a)+1,1,1,2-Tetrafluoroethane (R-134a)System

摘要

The surface tensions of the binary mixtures 1,1,1-trifluoroethane (R-143a)+1,1,1,2-tetrafluoroethane (R-134a)were measured in the temperature range from (257 to 329)K using the differential capillary rise method under vapor-liquid equilibrium conditions.The uncertainties of measurements for the temperature and surface tension were estimated to be within ±10 mK and ±0.15 mN(centre dot)m~(-1),respectively.The experimental surface tension data of R-143a+R134a were correlated as a function of the mass fraction using the correlations for pure R-143a and R-134a.