Self-diffusion in water and monohydric alcohols

Abstract

Self-diffusion coefficients for methanol, ethanol, n-propanol, i-propanol and water have been measured as a function of temperature in the range 25–65°C. A flow technique has been used for the first time in the determinations, and the diffusion process has been monitored with the aid of monodeuterated tracers. The self-diffusion coefficients reported for methanol and water are in good agreement with the best available data obtained using n.m.r. techniques. The results have been used to examine both the Eyring theory of liquid diffusion and the more recent correlation of Ertl and Dullien.