Abstract
The gas-phase relative electric permittivities, densities, and liquid drop out volumes within the two-phase envelope have been determined from measurements of the resonance frequency of the lowest order inductive−capacitance mode of a re-entrant cavity for (0.4026 CH4 + 0.5974 C3H8); the dew temperatures between (315.5 and 340.4) K that correspond to dew pressures of (2.87 to 6.83) MPa for this mixture along with a description of the apparatus were reported by Kandil et al. (J. Chem. Thermodyn. 2005, 37, 684−691). The relative permittivity of the gas was determined with an uncertainty of 0.01 %. These results differed by between −(0.02 and 0.4) % from estimates obtained from the correlation reported by Harvey and Lemmon (Int. J. Thermophys. 2005, 26, 31−46) and the precise measurements of Schmidt and Moldover (Int. J. Thermophys. 2003, 24, 375− 403) for the pure components when the Oster (J. Am. Chem. Soc. 1946, 68, 2036−2041) mixing rule for total molar polarizabilities was applied. Gas densities were ob...
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