Static permittivity, density, speed of sound, and refractive index of 2-propoxyethanol mixtures with water in a wide temperature range

• The speed of sound, density, static permittivity and refractive index of propoxyethanol + water mixtures were measured.
• The temperature dependencies of molar volume, compressibility coefficients and static permittivity were analyzed.
• The values of derivatives of enthalpy, entropy and heat capacity with respect to pressure were calculated.
• Kirkwood’s correlation factor was determined.

The static permittivity, εr, density, ρ, speed of sound, u, and refractive index, nD, of water + 2-propoxyethanol mixtures were measured over the entire range of mixture composition in a wide temperature range. The experimental values of density and speed of sound were used to determine the molar volume, Vm, adiabatic compressibility, βS  , and their excess values. Also the values of partial molar volumes V‾1 and V‾2 as well as the thermodynamic parameters namely the entropy derivative after pressure, ∂S/∂p, enthalpy derivative after pressure, ∂H/∂p and molar heat derivative after pressure, ∂C/∂p of the mixtures were determined.The experimental data of static permittivity were used to determine deviations from the additivity of permittivity, Δεr, excess of this value, εrE, temperature coefficient of permittivity, ∂ln εr/∂T, and their excesses, (∂ln εr/∂T)E.Using the results of refractometric analysis and static permittivity, the values of Kirkwood’s correlation factor, gK, and their excess values, gKE, were also determined.The concentration and temperature dependent results of the mixtures were used in the analysis of hydrogen bond interactions occurring between the molecules of water and 2-propoxyethanol.