The enthalpies of dilution in water of aqueous solutions containing a 'structure-breaking' solute, thiourea or biuret, and polyols of increasing number of hydroxyl groups, have been measured at 298.16 K, by means of a flow microcalorimeter. The heterotactic coefficients of the virial expansion of the excess enthalpies were determined. The sign and the values of the coefficients are dependent on the polyol and practically independent of the structure-breaking solute. The results are interpreted as due to the prevailing release of water from the destructured domains of the cospheres of polyols.
Enthalpies of dilution of aqueous solutions containing 'structure-breaking' solutes and polyols. Biuret-polyol-water and thiourea-polyol-water systems at 298.16 K / C., Cascella; Castronuovo, Giuseppina; Elia, Vittorio; Sartorio, Roberto; Wurzburger, Silvana. - In: JOURNAL OF THE CHEMICAL SOCIETY. FARADAY TRANSACTIONS I. - ISSN 0300-9599. - ELETTRONICO. - 85:(1989), pp. 3289-3299. [10.1039/F19898503289]
Enthalpies of dilution of aqueous solutions containing 'structure-breaking' solutes and polyols. Biuret-polyol-water and thiourea-polyol-water systems at 298.16 K
CASTRONUOVO, GIUSEPPINA;ELIA, VITTORIO;SARTORIO, ROBERTO;WURZBURGER, SILVANA
1989
Abstract
The enthalpies of dilution in water of aqueous solutions containing a 'structure-breaking' solute, thiourea or biuret, and polyols of increasing number of hydroxyl groups, have been measured at 298.16 K, by means of a flow microcalorimeter. The heterotactic coefficients of the virial expansion of the excess enthalpies were determined. The sign and the values of the coefficients are dependent on the polyol and practically independent of the structure-breaking solute. The results are interpreted as due to the prevailing release of water from the destructured domains of the cospheres of polyols.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
