Volumetric properties of aqueous binary mixtures of 2-diethylaminoethanol from 283.15 to 303.15 K

Abstract

We report volumetric properties of the binary mixture of 2-diethylaminoethanol (DEEA) with water. Density values were determined as a function of composition in the temperature range 283.15 to 303.15 K. For the DEEA at 298.15 K (molar volume, 133.2 cm³ mol⁻¹) the measurements have given a limiting partial molar volume of 123.3 cm³ mol⁻¹. To gain some insight into the several aggregation patterns present in the mixtures studied, calculation of excess molar volumes of the mixture, apparent molar volumes of DEEA, as well as excess partial molar volumes of both components were made over the entire composition and temperature ranges. As expected the whole set of results reveals strong deviations from ideality. The excess molar volumes exhibit negative deviations while apparent molar volumes of DEEA and excess partial molar volumes show a complex dependence on composition and temperature.