The rate of evaporation of droplets. V. Evaporation characteristics of some branched-chain hydrocarbons and a straight-chain fluorocarbon

Abstract

The vapour pressures, latent heats of vaporization and densities have been determined for (C$_{7}$H$_{15}$)$_{3}$CH and (C$_{10}$H$_{21}$)$_{3}$CH at 25 to 40 degrees C, and the rate of evaporation of droplets has been studied at a range of air pressures at 25 to 35 degrees C. Diffusion coefficients in air and collision radii have been calculated. The evaporation coefficient is unity. For n-C$_{16}$F$_{34}$ the vapour pressure and heat of sublimation have been determined at 15 to 30 degrees C, and the values of diffusion coefficients and collision areas have been determined from the evaporation characteristics of solid beads. A comparison has been made of the data for straight- and branched-chain hydrocarbons, and for straight-chain fluoro- and hydrocarbons.