Journal of Solution Chemistry

, Volume 5, Issue 9, pp 631–644 | Cite as

Enthalpies of the urea-tert-butanol-water system at 25°C

  • Jacques E. Desnoyers
  • Gérald Perron
  • Lévon Avédikian
  • Jean-Pierre Morel
Article
Received:

Abstract

The enthalpies of solution of urea (U) in water (W)-tert-butanol (TBA) mixtures and of TBA in W-U mixtures, the enthalpies of dilution of TBA in W, and the enthalpies of mixing of U and TBA aqueous solutions were measured with a solution calorimeter and a flow microcalorimeter. Enthalpies of transfer of U and TBA to the mixed solvents were derived. Also, pair and triplet interaction parameters between the various solutes were derived from the mixing and dilution experiments. The enthalpic pair parameter hU-TBA is positive, suggesting that the main contribution to this parameter is the decrease in hydrophobic hydration of TBA in the presence of U.

Key words

Enthalpies of transfer enthalpies of mixing ternary systems urea tert-butanol 
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. J. Kozak, W. S. Knight, and W. Kauzmann,J. Chem. Phys. 48, 675 (1968).Google Scholar
  2. 2.
    H. L. Friedman and C. V. Krishnan,J. Solution Chem. 2, 2460 (1973).Google Scholar
  3. 3.
    R. B. Cassel and R. H. Wood,J. Phys. Chem. 78, 2465 (1974).Google Scholar
  4. 4.
    F. Franks, M. Pedley, and D. S. Reid,J. Chem. Soc. Faraday Trans. I,72, 359 (1976).Google Scholar
  5. 5.
    Y. Pointud, J. Juillard, L. Avédikian, J.-P. Morel and M. Ducros,Thermochim. Acta 8, 423 (1974).Google Scholar
  6. 6.
    L. Avédikian, G. Perron, and J. E. Desnoyers,J. Solution Chem. 4, 331 (1975).Google Scholar
  7. 7.
    J. E. Desnoyers, G. Perron, J.-P. Morel, and L. Avédikian,Chemistry and Physics of Aqueous Gas Solutions, W. A. Adams, ed. (Electrochemical Society, Princeton, 1975), p. 172.Google Scholar
  8. 8.
    N. Desrosiers, G. Perron, J. G. Mathieson, B. E. Conway, and J. E. Desnoyers,J. Solution Chem. 3, 789 (1974).Google Scholar
  9. 9.
    N. Dollet and J. Juillard,J. Solution Chem., in press.Google Scholar
  10. 10.
    L. Avédikian, J. Juillard, J.-P. Morel, and M. Ducros,Thermochim. Acta 6, 283 (1973).Google Scholar
  11. 11.
    P. Picker, C. Jolicoeur, and J. E. Desnoyers,J. Chem. Thermodyn. 1, 469 (1969).Google Scholar
  12. 12.
    P. Picker,Can. Res. Dev. 7(1), 11 (1974).Google Scholar
  13. 13.
    V. B. Parker, Thermal properties of aqueous uni-univalent electrolytes, NSRDSNBS 2 (1965).Google Scholar
  14. 14.
    R. B. Cassel and R. H. Wood,J. Phys. Chem. 78, 2460 (1974).Google Scholar
  15. 15.
    M. Y. Schrier, P. J. Turner, and E. E. Schrier,J. Phys. Chem. 79, 1391 (1975).Google Scholar
  16. 16.
    C. de Visser, H. J. M. Grünbauer, and G. Somsen,Z. Phys. Chem. (N.F.) 97, 69 (1975).Google Scholar
  17. 17.
    J. Kenttämaa, E. Tommila, and M. Martti,Ann. Acad. Sci. Fenn., Ser. A2,93 (1959).Google Scholar
  18. 18.
    E. M. Arnett and D. R. McKelvey,J. Am. Chem. Soc. 88, 2598 (1966).Google Scholar
  19. 19.
    D. J. T. Hill, Ph. D. Thesis, Queensland (1965).Google Scholar
  20. 20.
    C. V. Krishnan and H. L. Friedman,J. Phys. Chem. 73, 1572 (1969).Google Scholar
  21. 21.
    E. M. Arnett, W. B. Kover, and J. V. Carter,J. Am. Chem. Soc. 91, 4028 (1969).Google Scholar
  22. 22.
    J.-L. Fortier, P.-A. Leduc, P. Picker, and J. E. Desnoyers,J. Solution Chem. 2, 467 (1973).Google Scholar
  23. 23.
    F. F. Gucker and H. B. Pickard,J. Am. Chem. Soc. 62, 1464 (1940).Google Scholar
  24. 24.
    C. de Visser and G. Somsen,Rec. Trav. Chim. 91, 942 (1972).Google Scholar

Copyright information

© Plenum Publishing Corporation 1976

Authors and Affiliations

  • Jacques E. Desnoyers
    • 1
  • Gérald Perron
    • 1
  • Lévon Avédikian
    • 2
  • Jean-Pierre Morel
    • 2
  1. 1.Department of ChemistryUniversité de SherbrookeSherbrookeCanada
  2. 2.Laboratoire des Interactions Soluté-SolvantUniversité de ClermontAubièreFrance

Personalised recommendations