Resumo

CRISTANCHO, Diana M et al. Volumetric properties of glycerol + water mixtures at several temperatures and correlation with the Jouyban-Acree modelPropiedades volumétricas de mezclas glicerol + agua a varias temperaturas y correlación con el modelo Jouyban-Acree. Rev. colomb. cienc. quim. farm. [online]. 2011, vol.40, n.1, pp.92-115. ISSN 0034-7418.

Excess molar volumes and partial molar volumes were investigated from density values of the literature for glycerol + water mixtures at temperatures from (288.15 to 303.15) K. Excess molar volumes were fitted by Redlich-Kister equation and compared with values of literature for other similar systems. The system exhibits negative excess volumes probably due to increased interactions like hydrogen bonding and/or large differences in molar volumes of components. The effe ct of temperature on different volumetric properties studied is also analyzed. Besides, the volume thermal expansion coefficients are also calculated founding values from 2.51 x 10 ^-4 K ^-1 for water to 7.24 x 10 ^-4 K ^-1 for glycerol at 298.15 K. The Jouyban-Acree model was used for density and molar volume correlations of the studied mixtures at different temperatures. The mean relative deviations between experimental and calculated data were 0.19 ± 0.11 % and 0.32 ± 0.25 %, respectively for density and molar volume data.

Palavras-chave : glycerol; water; binary liquid mixtures; density; excess volume; Jouyban- Acree model.

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