Vapor pressure of liquid cesium by a Knudsen-effusion radiotracer technique
作者： Robert G Behrens , Harry O Woodrow , Seymour Aronson
DOI: 10.1016/0021-9614(77)90180-X
关键词: Vaporization 、 Caesium 、 Physical chemistry 、 Atmospheric temperature range 、 Vapor pressure 、 Bond length 、 Effusion 、 Enthalpy 、 Chemistry 、 Knudsen number 、 Physical and Theoretical Chemistry 、 General Materials Science 、 Atomic and Molecular Physics, and Optics
摘要: Abstract The vapor pressure of liquid cesium has been measured over the temperature range 327 to 459 K using a Knudsen-effusion radiotracer technique. this is ( R cal th −1 mol ) ln p atm = −(16493±522) T )+(16.02±1.38) third-law enthalpy for reaction Cs(c) Cs(g) obtained from present results ΔHo(298.15 K) (18.44 ± 0.36) kcalth mol−1. second-law result (17.31 0.52) Standard thermodynamic functions Cs2(g) are computed spectroscopically derived CsCs bond distance. entropy be So(298.15 68.053 calth K−1 mol−1, 0.2 mol−1 higher than previously reported value. Literature pressures above 500 re-evaluated and compared with literature low-temperature pressures. On basis evaluation, vaporization chosen (18.33±0.36)
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