Excess Thermodynamic Study of Binary Mixtures of Benzyl Alcohol with Amides at Temperatures 298.15–323.15 K

Abstract

The speeds of sound, u, and densities, ρ, of the blends of benzyl alcohol with amides including those of pure liquids, have been determined over the mole fraction range of 0 to 1 for benzyl alcohol, with intervals of 0.1, at 298.15–323.15 K and a pressure of 0.1 MPa. The measured data were utilized to evaluate various thermodynamic excess properties, including excess molar volumes, $V_m^E$, excess isentropic compressibility, ${\kappa }_s^E$, excess speeds of sound, u^E, excess molar isentropic compressibility, $K_{s,m}^E$, excess isobaric thermal expansion, ${\alpha }_p^E$. These excess properties were calculated and subsequently correlated using the Redlich–Kister equation. The excess partial molar volumes, ${\overline{V}}_{m,1}^E$ and ${\overline{V}}_{m,2}^E$ and excess partial molar isentropic compressibilities, ${\overline{K}}_{s,m,1}^E$ and ${\overline{K}}_{s,m,2}^E$, excess partial molar volumes, ${\overline{V}}_{m,1}^{°E}$ and ${\overline{V}}_{m,2}^{°E}$, and excess partial molar isentropic compressibilities, ${\overline{K}}_{s,m,1}^{°E}$ and ${\overline{K}}_{s,m,2}^{°E}$, of the components at infinite dilution have also been measured. The departure of the measured properties has been explored in terms of intermolecular interactions.