Partial excess molar volumes, partial excess isentropic compressibilities and relative permittivities of water+ethane-1,2-diol derivative and water+1,2-dimethoxyethane at different temperatures

Experimental densities, rho, speed of sound, upsilon and relative permittivities, epsilon(r) for four binary mixtures of water + (monomeric, dimeric and trimeric) forms of ethane-1,2-diol and + 1,2-dimethoxyethane were measured over the mole fraction and at different temperatures. The excess molar volumes, V-m(E), excess isentropic compressibilities, k(s)(E) and deviations in relative permittivities, 86, were calculated and the data was smoothed using Redlich-Kister equation. The partial excess molar volumes, (V) over bar (E)(l) and excess isentropic compressibilities, (k) over bar (E)(sl) of water were calculated from the smoothed data of respective excess functions. The variations of the partial molar excess functions were qualitatively analyzed over the entire water mole fractions as well as in extreme water rich regions. The standard transfer functions for each of the partial molar quantities were calculated for the different combinations of mixtures at different temperatures. The variation of Kirkwood correlation factor, g(K) has also been examined in the entire range of compositions. The results of the analysis revealed that both hydrophilic -OH... water interactions and hydrophobic influence of -CH2-CH2- or -CH3 and -OCH2-CH2- groups on the proximal water are predominant factors that contribute to the measured magnitudes of volumetric and compressibility properties. (C) 2003 Elsevier B.V. All rights reserved.