Volume properties of liquid mixture of water + glycerol over the temperature range from 278.15 to 348.15 K at atmospheric pressure

• Temperature-dependent densities of water + glycerol mixtures were measured.
• Excess molar volumes and partial molar volumes of components were calculated.
• Coefficients of isobaric expansion for mixture and components were discussed.

Densities of {water (1) + glycerol (2)} binary mixture have been measured with vibrational densimeter over the whole concentration range within the temperature interval 278.15–348.15 K. Excess molar volumes and molar isobaric expansions of the mixture, apparent and partial molar volumes, as well partial molar isobaric expansions of water and glycerol in the mixture, limiting partial molar volumes and limiting partial molar isobaric expansions of water and glycerol have been calculated. It was shown that the mixture densities increased on the glycerol molar fraction rising at every temperature studied, and at low glycerol concentrations this increase was more pronounced. Magnitudes of excess molar volumes of the mixture were negative at all temperatures. But the deviation from ideality decreased with temperature growth. Molar isobaric expansions of the mixture increased almost linearly when glycerol concentration went up. Concentration dependences of partial molar isobaric expansions of water and glycerol were characterized by extremes occurrence.