Thermodynamic properties of binary liquid mixtures of benzyl alcohol with 2-Alkoxyethanols at varying temperatures

Abstract

In the present research, density (ρ) and speed of sound (u) for binary liquid mixtures of the benzyl alcohol (BA) with three 2-alkoxyalcohols {2-methoxyethanol (2-ME), 2-ethoxyethanol (2-EE), and 2-butoxyethanol (2-BE)} at temperatures of 298.15, 303,15 and 308.15 K have been measured over complete concentration of benzyl alcohol under 0.1 MPa pressure. According to measured results, excess molar volume (VmE) and deviation in isentropic compressibility (Δκs) were computed and these observed results were correlated to Redlich−Kister (R-K) polynomial expansion. Further, molar volume (Vm), apparent molar volumes (Vm,∅,1 and Vm,∅,2), acoustic impedance (Z), isentropic compressibility (ks), intermolecular free length (Lf), deviation in intermolecular free length (ΔLf) were calculated at all worked temperatures. For all studied systems, excess molar volume (VmE) and deviation in isentropic compressibility (Δκs), and deviation in intermolecular free length (ΔLf) were negative over the entire mole fraction range of benzyl alcohol at all measured temperatures. Among the three systems, benzyl alcohol with 2-ethoxyethanol containing system showed more negative. By using the obtained results, intermolecular interactions were discussed between benzyl alcohol and 2-alkoxyethanols. Moreover, the influence of temperature on intermolecular interactions was analyzed using above said parameters.