Abstract
The aim of this research is the experimental determination of density, viscosity, refractive index and speed of sound for binary mixtures of the ester ethyl acetate and alcohols. Experimental measurements were carried out for two systems with 1-propanol and 1-butanol at atmospheric pressure and in a temperature range 288.15 - 323.15 K. Results of experimental measurements were further used to determine excess molar volumes, viscosity deviations, refractive index deviations, and excess isentropic compressibility for each investigated mixture. These calculated data were correlated using the empirical Redlich-Kister equation. Positive values of the excess molar volume and isentropic compressibility appear for both analysed systems, while values of viscosity and refractive index deviations are negative. The structure and specific characteristics of different molecules in considered mixtures and determined non-ideal behaviour allow the insight into the possible type of interactions in the mixture, interstitial accommodation and structural effects.
Highlights
Density, refractive index, viscosity and speed of sound represent thermophysical properties of a fluid that characterize each pure substance in the liquid state, as well as their mixtures
Positive values of the excess molar volume and isentropic compressibility appear for both analysed systems, while values of viscosity and refractive index deviations are negative
Refractive index, viscosity and speed of sound represent thermophysical properties of a fluid that characterize each pure substance in the liquid state, as well as their mixtures
Summary
Refractive index, viscosity and speed of sound represent thermophysical properties of a fluid that characterize each pure substance in the liquid state, as well as their mixtures. Knowledge of these properties is very important for design and operation of separation processes and equipment in the chemical industry, calculation of heat exchangers, fluid transport, as well as for the development of new thermodynamic models [1]. Part of our research with ester and alcohol mixtures [2,3,4] is related to ethyl acetate, ethyl ester of acetic acid It is widely used in the industry, primarily as a solvent and diluent, being favoured because of its low cost, low toxicity, and agreeable sweet odour. The Redlich-Kister polynomial was used to show the analytical dependence of the experimental data on the mixture composition
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