Calculation of the Vapor Pressure and Heats of Vaporization and Sublimation of Liquids and Solids Below One Atmosphere Pressure. Viii. xenon

摘要

The vapor pressure and heats of vaporization and sublimation of xenon were computed at one degree intervals from 165.02 (the normal boiling point) to 20K (p = 1.05 x 10 to the minus 34th power mm Hg). The computed vapor pressures were compared with the available experimental vapor pressure data. The computed triple point pressure, 612.45 mm Hg, is in excellent agreement with the best experimental value (612.5 mm Hg.). It is believed that the computed values represent the experimental data within the present limits of uncertainty of the measurements and the temperature scales used by the different investigators. The computed values are especially recommended for use in the temperature range below the triple point (161.37K) where experimental data are scanty of lacking. The heat of sublimation of xenon at zero degrees K was computed to be 3798 cal/gm mole. The calorimetric entropy of the ideal gas was re-computed to be 37.708 cal/gm mole degrees K. (Author)