Abstract
Abstract Thermodynamic interactions in binary mixtures of styrene with n-alkanes have been studied in terms of excess quantities using the experimental results of density, viscosity, and speed of sound at 298.15 K. Flory as well as Prigogine–Flory–Patterson equations were used to calculate the excess molar volume in addition to enthalpy, entropy, and free-energy mixing functions. The viscosity results were analysed using Bloomfield and Dewan theory to predict viscosity deviations, while the speed-of-sound results were analysed by Benson and Kiyohara theory to predict the deviations in isentropic compressibility. The Prigogine–Saraga theory was used to calculate the deviations in internal pressure of liquids and liquid mixtures. Furthermore, isothermal compressibility values were predicted from the Flory equation of state and compared with the experimentally obtained values. Overall, the computed and experimental results are discussed in terms of thermodynamic interactions between the mixing components.
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