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Received August 5, 2017
Accepted December 26, 2017
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Ultrasonic velocity measurements in isobutyric acid - water binary mixtures over the temperature range from 300.15 to 313.15 K

1Laboratoire de Physique des Liquides Critiques, Département de Physique, Faculté des Sciences de Bizerte, Zarzouna 7021 Bizerte, Université de Carthage, Tunisia 2Unité de Recherche de Physique des Liquides et d’Optique Non Linéaire, Département de Physique, Faculté des Sciences de Tunis, Campus Universitaire, El Manar 2092 Tunis, Université de Tunis El Manar, Tunisia
Adel.TToumi@fst.rnu.tn
Korean Journal of Chemical Engineering, August 2018, 35(8), 1687-1699(13), 10.1007/s11814-017-0352-2
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Abstract

We measured the ultrasonic velocity, U, density, ρ, and viscosity, η in Isobutyric acid - water binary liquid mixtures over the entire composition range at temperatures ranging from 300.15 to 313.15 K under atmospheric pressure. The experimental data values were analyzed to determine, various acoustical parameters: adiabatic compressibility, β, acoustic impedance, Z, free length, Lf, free volume, Vf, molar volume, Vm, relaxation time, τ, absorption coefficient, α/f2, internal pressure, π i, Gibb…s free energy, ΔG, cohesive energy, CE, Wada…s constant, W, Rao…s constant, Rm and relative association, RA. The variation of these parameters versus the mixture composition was explained on the basis of the intermolecular interactions between the components of the mixture.

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