Abstract

Manpreet Kaur

DOI : http://dx.doi.org/10.13005/ojc/370330

Interactions of electrolytes in a binary mixture can be determined by various techniques. Ultrasonic velocity measurements prove to be one of the important tools for measuring various acoustic properties at variable temperature. Thermo acoustic parameters like Isentropic compressibility (κs),Acoustic impedance (Z), Free volume (Vf), Absorption coefficient (Abscoeff), Intermolecular free length (Lf), Gibb’s free energy (ΔG), Relaxation time (τ), Rao’s constant (Rm), Internal pressure (πi), Wada’s constant (w), and Entropy (H) for Tetrabutylammonium tetraphenylborate (Bu4NBPh4) and Tetrabuty lammonium perchlorate (Bu4NClO4) was calculated using experimental ultrasonic velocities, viscosities and densities at three different temperatures (298K, 308 K and 318K) and 1 atmospheric pressure in non-aqueous solvents like Dimethylsulfoxide (DMSO), Pyridine (Py) and their binary mixtures at 0, 20, 40, 60, 80 and 100 mol% of Py at variable temperatures ranging from 298K to 318K. Both Bu4NBPh4, Bu4NClO4, showed an increase in the ultrasonic velocity values at all the temperatures. This shows that molecular interactions are taking place in both the electrolytes. These increases in the molecular interactions with increase in the concentration of electrolytes in the solvent mixture were discussed in terms of solvent structural effects. And results showed the greater molecular interaction in DMSO rich regions.

Acoustic Studies; Density; Non-Aqueous Solvents; Molecular Interaction; Ultrasonic Velocity

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