Journal of Pure and Applied Ultrasonics

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Acoustical and excess thermodynamic studies of binary liquid mixtures at varying temperature using ultrasonic technique


Affiliations
1 Pope's College, Sawyerpuram-628 251, Tamil Nadu, India., India
2 Department of Physics, Kamaraj College, Thoothukudi-628 003, Tamil Nadu, India., India
 

The ultrasonic velocity, density and viscosity of binary liquid mixtures of lactic acid with methanol, 1-propanol and 2- propanol of various compositions at 308 K, 313 K, 318 K and 323 K were determined. These experimental data have been used to estimate the thermodynamic parameters such as adiabatic compressibility (β),free length (L f ), free volume (V f ), internal pressure (π i )and enthalpy (H). The excess values of the above parameters like excess adiabatic compressibility, excess free length, excess free volume, excess internal pressure and excess enthalpy are also evaluated in order to dispute the nature of molecular interactions present among the constituent molecules of binary liquid mixture systems.

Keywords

Thermodynamic Parameters, 1-Propanol, Density, Excess Free Volume, Molecular Interactions.
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  • Acoustical and excess thermodynamic studies of binary liquid mixtures at varying temperature using ultrasonic technique

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Authors

C. Duraivathi
Pope's College, Sawyerpuram-628 251, Tamil Nadu, India., India
Jeya Priya
Department of Physics, Kamaraj College, Thoothukudi-628 003, Tamil Nadu, India., India
J. Poongodi
Department of Physics, Kamaraj College, Thoothukudi-628 003, Tamil Nadu, India., India
H. Johnson Jeyakumar
Department of Physics, Kamaraj College, Thoothukudi-628 003, Tamil Nadu, India., India

Abstract


The ultrasonic velocity, density and viscosity of binary liquid mixtures of lactic acid with methanol, 1-propanol and 2- propanol of various compositions at 308 K, 313 K, 318 K and 323 K were determined. These experimental data have been used to estimate the thermodynamic parameters such as adiabatic compressibility (β),free length (L f ), free volume (V f ), internal pressure (π i )and enthalpy (H). The excess values of the above parameters like excess adiabatic compressibility, excess free length, excess free volume, excess internal pressure and excess enthalpy are also evaluated in order to dispute the nature of molecular interactions present among the constituent molecules of binary liquid mixture systems.

Keywords


Thermodynamic Parameters, 1-Propanol, Density, Excess Free Volume, Molecular Interactions.

References