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Ultrasonic speed and its derived parameters of the binary solvent systems provide important information regarding intermolecular interactions between the component molecules of these systems. The ultrasonic speeds, u and densities, of binary mixtures of polyethylene glycol 200 with methyl acrylate, ethyl acrylate, n-butyl acrylate, including those of pure liquids, over the entire composition range were measured at temperatures (293.15, 298.15, 303.15, 308.15, 313.15, 318.15 and 323.15) K and atmospheric pressure. Using the experimental data, excess isentropic compressibility, excess molar isentropic compressibility, excess speed of sound, have been calculated. The excess properties were correlated by the Redlich-Kister polynomial equation. The partial molar compressibilities and excess partial molar compressibilities over the whole composition range and at infinite dilution have also been calculated. The variations of these parameters with composition and temperature are discussed in terms of intermolecular interactions in these mixtures. Furthermore, the values of ultrasonic speeds for these mixtures have also been calculated by using scaled particle theory and the results are compared with the experimental findings.
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