Thermodynamic Studies of Liquid Mixtures of Ethyl Lactate with Amino-, Chloro- and Phenyl Ethanols at Different Temperatures

Mallampalli V. D. N. S. Madhavi; P. V. S. Sairam; G. Srinivasa Rao

doi:10.15866/irea.v11i3.23022

Thermodynamic Studies of Liquid Mixtures of Ethyl Lactate with Amino-, Chloro- and Phenyl Ethanols at Different Temperatures

Mallampalli V. D. N. S. Madhavi^(1*), P. V. S. Sairam⁽²⁾, G. Srinivasa Rao⁽³⁾

^(*) Corresponding author

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DOI: https://doi.org/10.15866/irea.v11i3.23022

Abstract

Molecular associations of the liquids viz., aminoethanol (AE), chloroethanol (CE) and phenylethanol (PE) with Ethyl Lactate (EL) as common liquid at different temperatures are examined from the experimentally measured values of speed of ultra sound (U), coefficient of viscosity (η) and density (ρ). The variation of U, ρ and η with temperatures are discussed in reference to molecular interactions. From the experimental data, various thermodynamic and excess parameters are computed which are critical in the analysis of molecular associations. Excess functions of molar volume (VmE) and isentropic compressibility (∆κs) are observed as negative while the viscosity deviations (∆η) are observed as positive in all the cases. The partial molar volumes and the corresponding excess properties have been computed and compared with the excess molar volumes. The studies showed that the associations of EL with AE, CE and PE follow the order: EL + AE> EL + CE> EL + PE.
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Keywords

Excess Molar Volume; Isentropic Compressibility; Molecular Interactions; Partial Molar Volume; Thermodynamic Parameters

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