Volumetric Properties of Aqueous Solutions of Ethylene Glycols in the Temperature Range of 293.15–318.15 K

Abstract

Densities of aqueous solutions of Ethylene glycol (EG), diethylene glycol (DEG), and triethylene glycol (TEG) were measured at temperatures from 293.15 to 318.15 K and molalities ranging from 0.0488 to 0.5288 mol⋅kg −1 . Volumes of all investigated solutions at a definite temperature were linearly dependent on the solute molality; from this dependence the partial molar volumes at infinite dilution were determined for all solutes. It was found that the partial molar volumes at infinite dilution ( 2,0 ) were concentration independent and slightly increase with increasing temperature. The partial molar volumes at infinite dilution ( 2,0 ) or the limiting apparent molar volumes of ethylene glycols were fitted to a linear equation with the number of oxyethylene groups ( ) in the solute molecule. From this equation a constant contribution of the terminal (OH) and the (CH 2 CH 2 O) groups to the volumetric properties was obtained. The thermal expansion coefficient ( 1,2 ) for all investigated solutions was calculated at temperatures from 293.15 to 318.15 K. The thermal expansion coefficients for all solutes increase with increasing temperature and molality. Values of ( 1,2 ) were higher than the value of the thermal expansion coefficient of the pure water.

Thermodynamic Interactions Study of Some Ethylene Glycols in Aqueous Aniline Solutions at Different Temperatures: An Acoustical and Volumetric Approach

“…From Table , it is detected that densities are surging with surge in concentration of EGs and are falling with surge in temperature at a certain concentration of the aniline solution. The comparison of experimental values and literature values − of densities of (EG, DEG, TEG) + water is represented in Figures to and comparison for aniline + water is shown in Figure . From the figures, it is observed that the obtained density values track the same inclination as the literature values.…”

“…Plots of experimental (filled circle) and literature values (empty square; empty triangle; star; cross; empty circle; filled diamond; empty diamond) of densities for (ethylene glycol + water) mixtures at different temperatures: red, 293.15 K; blue, 298.15 K; green, 303.15 K; brown, 308.15 K.…”

Investigation on Temperature-Dependent Volumetric and Acoustical Properties of Homologous Series of Glycols in Aqueous Sorbitol Solutions

“…It is observed from Table that at a particular concentration of sorbitol, the density values of the liquid mixtures are increasing with rise in concentration of glycol and decreasing with rise in temperature. The plots of experimental data and literature data − of densities of (EG, DEG, TEG) + water are shown in Figures – and the plots of experimental and literature values − for density and ultrasonic velocity of sorbitol + water are shown in Figures and , respectively. It is noted from the figures that the experimental values follow the same trend as the literature values.…”

“…Plots of experimental (filled circle) and literature values (empty square; empty triangle; star; cross; empty circle; empty diamond) of densities for (ethylene glycol + water) mixtures water at different temperatures [red, 288.15 K; blue, 298.15 K; green, 308.15 K, brown, 318.15 K].…”

Mixing Functions of Binary Liquid Mixtures of Cyclic Alcohols and Ethylene Glycol at T = 293.15–318.15 K and Pressure P = 0.1 MPa: An Approach from the Volumetric and Viscometric Properties

“…Cyclic alcohols and ethylene glycol have important industrial uses. For instance, ethylene glycol is widely used in various research such as flue gas treatment, cosmetics, antifreeze, textile, heat transfer fluid polymer precursor, petroleum, and pharmaceutical applications. − When it is mixed with polar solvents, there occurs a disruption of the associated structure. Further, the presence of oxy and hydroxyl groups in the same molecule makes a versatile molecule to form intra- and intermolecular hydrogen bonds .…”