Studies on molecular interactions in binary liquid mixtures by viscosity and ultrasonic velocity measurements at 303.15 K

The densities, viscosities, and ultrasonic velocities of pure ethanol, 1-hexanol 1-octanol acetonitrile, N,N-dimethylformamide, and of the binary mixtures of ethanol with 1-hexanol and 1-octanol and those of acetonitrile with N,N-dimethylformamide were determined at 303.15 K. The excess adiabatic compressibility, excess intermolecular free length, excess volume, excess viscosity, excess acoustic impedance, and the molecular association have been calculated from the experimental data. These parameters are used to discuss the nature and the extent of intermolecular interactions in the mixtures. (C) 1999 Elsevier Science B.V. All rights reserved.