Dmitriy M. Makarov

Volumetric Properties of Binary Mixtures of Glycerol + tert-Butanol over the Temperature Range 293.15 to 348.15 K at Atmospheric Pressure

Densities of glycerol (1) + tert-butanol (2) mixtures were measured over the temperature range 293.15 to 348.15 K at atmospheric pressure, over the entire composition range, with a vibrating tube densimeter. Excess molar volumes, apparent and partial molar volumes of glycerol and tert-butanol, thermal isobaric expansivities of the mixture and partial molar expansivities of the components were calculated. The excess molar volumes of the mixtures are negative at all temperatures, and deviations from ideality increase with increasing temperature. Excess molar volumes were fitted to the Redlich–Kister equation. Partial molar volumes of glycerol decrease with increasing tert-butanol concentration. The temperature dependence of the partial molar volumes of glycerol is characterized by an inversion at x2≈0.7. “Negative expansion” of the limiting partial volumes of glycerol was observed.

Volumetric properties of the water-ethylene glycol mixtures in the temperature range 278–333.15 K at atmospheric pressure

AbstractDensity of the water-ethylene glycol binary mixtures was measured in the entire range of compositions in the temperature range 278–333.15 K (6 values) at atmospheric pressure using a vibration densimeter. Mixtures with low concentrations of ethylene glycol were studied at 15 temperatures in the range of 274–333.15 K. Excess molar volumes VmE, the partial molar volumes of water -V1 and ethylene glycol, -V2, the coefficients of thermal volume expansion α of the mixture, the partial molar volume coefficients of thermal expansion of water

Compressibility coefficients of water-2-propanol mixtures over the temperature and pressure ranges 278–323.15 K and 1–1000 bar

\bar V_1

The compressibility of water-dimethyl sulfoxide mixtures over the temperature and pressure ranges 278–323.15 K and 1–1000 bar

and ethylene

Compressibility of ethylene glycol-dimethyl sulfoxide mixtures over the pressure range 0.1–100 MPa at 308.15 K

\bar V_2

INFLUENCE OF PRESSURE ON EXCESS THERMODYNAMIC CHARACTERISTICS OF WATER + ETHYLENEDIAMINE MIXTURE

were calculated. Excess molar volumes were described using the Redlich-Kister equation. The density ρ of the mixture was found to increase with the increasing ethylene glycol concentration at all temperatures, but at low content of ethylene glycol the dependence ρ = f(T) of the mixture at ∼276.5 K passed through a maximum. The coefficient α increases sharply in the composition range 0 < x < 0.2, in the range 0.5 < x <1 remains almost unchanged, and at T > 277 K is positive for all compositions. The dependences