Study of Densities, Viscosities and Ultrasonic Speeds of Binary Mixtures Containing 1,2-Dimethoxyethane and an Alkan-l-ol at 298.15 K

Abstract

The viscosity deviation (Δη), the excess molar volume (VE) and the ultrasonic speed (u) have been investigated from viscosity (η) and density (ρ ) measurements of binary liquid mixtures of 1,2-dimethyoxyethane with methanol, ethanol, propan-1-ol, butan-1-ol, pentan-1-ol, hexan-1-ol or octan-1-ol over the entire range of composition at 298.15 K. The excess volumes are negative over the entire range of composition for all of the mixtures with the exception of hexan-1-ol and octan-1-ol. The excess isentropic compressibilities (KSE) and viscosity deviations are negative for all of the mixtures. The magnitudes of the negative values of VE decrease with the number of carbon atoms of the alkan-1-ol. The trend of increasing KSE values with the chain length of the alkanol is similar to that observed in the case of VE. Graphs of VE, Δ η, KSE, Δ u, LfE and ZE against composition are presented as a basis for a qualitative discussion of the results.