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Interactions in aqueous solutions of urea and alcohols. Excess enthalpies at 25°C

✍ Scribed by Guido Barone; Giuseppina Castronuovo; Vittorio Elia

Publisher
Elsevier Science
Year
1982
Weight
450 KB
Volume
23
Category
Article
ISSN
0378-4487

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✦ Synopsis

The heats of dilution of ternary aqueous solutions of urea and alcohols have been determined at 25OC. From the experimental data the values of the excess enthalpies Hfj and of the pair enthalpy interaction coefficients h.. have been iJ evaluated and compared with the data reported in the literature. The values of the hij coefficients at 25'C are all positive and depend on the length and branching of the alkyl chain of the alcohols. The results are discussed in terms of the effects of a chaotropic agent", as urea, on the cospheres of mainly hydrophobic such as alcohols.

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✍ Hansjürgen Schönert; Leo Stroth 📂 Article 📅 1981 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 512 KB

## Abstract Isopiestic vapor pressure measurements of the ternary systems water + triglycine + urea and water + glycine‐L‐alanine + urea were made and used to calculate the Gibbs free energy of these systems. Together with recently published analogous results on systems, in which the first solute w