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Interactions in Aqueous Solutions of Hydrophilic Urea Derivatives and NaI at the Temperatures 293.15 and 303.15 K

100%
Pałecz B., Taniewska-Osińska S., Department of Phisical Chemistry I. o. C.
Acta Universitatis Lodziensis. Folia Chimica
|
1988
|
vol. 8
EN
Measurements were made of the enthalpies of solution of NaI in water and in aqueous 0.1, 0.7, 1.0 and 1.5 mol ureas kg H₂O solutions of thiourea (TU) or hydroxyurea (HU) at the temperatures 293.15 and 303.15 K. Taking advantage of the standard values of solution enthalpy of electrolytes in water and in aqueous solutions of thiourea and hydroxyurea, the enthalpic pair interaction coefficients of uruas molecule-averaged ion were determined [l, 2],
2
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Thermodynamic Functions of Activation for Viscous Flow in Electrolyto-Water-Organic Solvent Systems. Part I. NaI Solutions in Mixtures of Water with Isopropanol and Tert-butanol

100%
Kacperska A., Taniewska-Osińska S., Department of Phisical Chemistry I. o. C.
Acta Universitatis Lodziensis. Folia Chimica
|
1988
|
vol. 8
EN
Functions of activation for viscous flow ΔH*, ΔS*, and ΔG* have been calculated for the systems NaI-water-isopropanol in the range of temperatures 288.15-313.15 K and NaI-water-tert- -butanol in the range of temperatures 299.15-313.15 K. The calculations were made for NaI solutions with concentrations 0.5, 1.0 and 2.0 moles of salt per 100 moles of the solvent on the basis of our previous viscosity data. The results obtained have been interpreted from the point of view of alcohol effect on the water structure and that of NaI on a mixed solvent structure.
PL
Obliczono termodynamiczne funkcje aktywacji lepkiego przepływu ΔH*, ΔS* i ΔG* dla układów NaI-woda-izopropanol w zakresie temperatur 288.15-313.15 K i NaI-woda-tert-butanol w zakresie temperatur 299.15-313.15 K. Obliczenia wykonano dla roztworów NaI o stężeniach 0.5, 1.0 i 2.0 mole soli na 100 moli rozpuszczalnika. Uzyskane wyniki zinterpretowano z punktu widzenia wpływu alkoholu na strukturę wody oraz NaI na strukturę mieszanego rozpuszczalnika.
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