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The speed of sound of the gaseous 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) was measured for temperatures from 273 to 333K and pressures from 26 to 315kPa with a cylindrical, variable-path acoustic interferometer operating at 156.252kHz. The uncertainty of the speed of sound was less than +/-0.05%. The ideal-gas heat capacity at constant pressure and the second acoustic virial coefficients were...
A total of 84 vapor pressure data points for 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) have been measured in the temperature range from 243 to 375 K. The maximum total pressure uncertainty of these data is estimated to be within +/- 1 kPa. The purity of the sample used in this work is 99.9 mol%. Based on this data set, a vapor pressure equation for HFC-227ea has been developed. The root-mean-square...
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