Influence of temperature on ultrasonic velocity measurements of ethanol plus water plus ethyl acetate mixtures

The ultrasonic velocity of the ternary mixtures ethanol + water + ethyl acetate at the range 288.15-323.15 K and atmospheric pressure, has been measured over the whole concentration range. The corresponding change of isentropic compressibility was computed from the experimental data. The results were fitted by means of a temperature-dependent equation, the parameters of which have been gathered in this experiment. The experimental ultrasonic velocities have been analyzed in terms of different theoretical models, an adequate agreement between the experimental and predicted values both in magnitude and sign being obtained, despite the high non-ideal trend of the studied mixture. The obtained experimental values indicate varying extent of interstitial accommodation among unlike molecules as a function of steric hindrance attending to ethyl acetate composition as key component and as a function of hydrogen bond and temperature attending to ethanol composition as key component.