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Journal of Solution Chemistry

, Volume 9, Issue 11, pp 867–876 | Cite as

Hydrophobic effect in aqueous solutions of nonelectrolytes. II. Cross-interactions of alkylureas

  • Guido Barone
  • Giuseppina Castronuovo
  • Attilio Cesáro
  • Vittorio Elia
Article

Abstract

The heats of mixing of the aqueous solutions of monomethylurea, monoethylurea, 1,3-dimethylurea, 1,3-diethylurea were determined at 25°C. The excess enthalpies obtained are expressed in virial form, in terms of pair and triplet interaction coefficients. A method previously discussed for predicting the excess enthalpies and the interaction coefficients of ternary solutions has been applied to the alkylureas. The large deviations between the experimental and calculated values, led to the modification of that method, which better accounts for the marked mixed character of these substances.

Key words

Hydrophobic interactions alkylureas excess enthalpy effectiveness coefficient ternary systems 

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Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • Guido Barone
    • 1
  • Giuseppina Castronuovo
    • 1
  • Attilio Cesáro
    • 2
  • Vittorio Elia
    • 1
  1. 1.Istituto ChimicoUniversity of NaplesNaplesItaly
  2. 2.Istituto ChimicoUniversity of TriesteTriesteItaly

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