Journal of Pure and Applied Ultrasonics

M. Geeta Lakshmi ¹, P. S. Naidu ¹, K. Ravindra Prasad ¹

Affiliations
1 Department of Physics, SVU PG Centre, Kavali-524201 (AP), IN

Abstract

Ultrasonic velocity, density and viscosity have been measured in the binary mixtures of alcohols with benzyl benzoate as common component at 30°C. The thermodynamic and other related parameters like isentropic compressibility, free length, internal pressure, Gibb's activation energy etc. have been computed and their excess parameters are analyzed in the light of molecular interactions between the constituent molecules in the mixture. In all the three binary mixtures, strong molecular interactions between unlike molecules are predicted besides dipole-dipole interactions. In all the three mixtures endothermic reaction appears to be prevalent.

Keywords

Ultrasonic Velocity, Benzyl Benzoate, Alcohols, Binary Mixtures, Molecular Interactions, Internal Pressure.

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J. Siva Sankar ¹, M. Geeta Lakshmi ¹, P. S. Naidu ¹, K. Ravindra Prasad ¹

Affiliations
1 Department of Physics, S.V.U.P.G. Centre, Kavali-524 201 (A.P.), IN

Abstract

Ultrasonic velocity, density and viscosity have been measured experimentally in the two binary mixtures of benzyl benzoate in dichloromethane and iso-butanol at three temperatures 30,35 and 40°C over the entire composition range. The thermodynamic and other allied parameters like adiabatic compressibility, free length, internal pressure, enthalpy etc. have been computed and the variation of the excess parameters like excess compressibility, excess internal pressure, excess enthalpy, excess activation energy etc. is analyzed in the light of inter molecular interactions in the mixtures. In both the mixtures, strong intermolecular interactions between the constituent molecules are suggested.

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