The Iodine Pentafluoride-Hydrogen Fluoride System. Solid-Liquid Equilibria, Vapor Pressures, Molar Volumes and Specific Conductances

摘要

Some properties of the Iodine pentafluori de-hydrogen fluoride system hare been investigated. The solid-liquid phase diagram shows a eutectic point at -83.49℃ and 99.5 mole# hydrogen fluoride. The vapor pressures at 15℃ show positive deviations from Raoult's law but no maximum vapor pressure was observed. There is a small decrease In volume on mixing, the maximum deviation from ideality being 6.6％ at 90 mole％ hydrogen fluoride. The specific conductance of pure iodine pentafluoride at 25℃ is 5.4 x 10-6 ohm-1 cm-1. The specific and molar conductances of mixtures of iodine pentafluoride and hydrogen fluoride have been measured over the entire concentration range.