Authors : J. N. Ramteke, A. Ghosh and S.A.Wani
Page Nos : 1070-1080
Description :
Ultrasonic velocity and absorption measurements in binary liquid mixture as a function of the concentration and concentration are useful in gaining insight into the structure and bonding of associated molecular complexes and other molecular processes occurs in these liquid mixtures. The results observed in these ultrasonic measurements have been correlated with molecular interactions in liquid mixtures with some degree of success. The absorption and velocity of sound in binary mixtures of triethylamine with Acetonitrile have been measured at a central frequency of 5MHz, using the interferometer. Ultrasonic absorption peaks at intermediate concentrations have been found in a binary mixture. In this work, measurements of the velocity, absorption coefficient, density, adiabatic compressibility, excess compressibility, and shear viscosity as functions of the concentration are reported. The adiabatic compressibility and excess compressibility were calculated from the velocity and the density measurements. The ultrasonic velocity (u), density (ρ) and viscosity (η) have been measured for the binary mixtures of triethylamine with Acetonitrile at 305.15K. From the experimental data, Adiabatic Compressibility (β), Free Length (Lf ), Free Volume (Vf)), Internal Pressure (i), Acoustic Impedance (Z), and Cohesive Energy(H) have been calculated. In addition to that the excess values of certain above parameters are also computed. These excess parameters have been used to discuss the presence of significant molecular interactions in binary mixture. By taking measurements at several concentrations of each liquid mixture, we obtained information about the molecular association between the two different molecules in the liquid mixture.
