Abstract
The enthalpy change on mixing solutions of methyl-substituted benzenesulfonic acids and their salts, with salts having a common cation or anion, at constant ionic strength in mixtures of 1,4-dioxane with water, were measured at 25°C. The heat effects of mixing solutions having a common anion increase almost linearly with the reciprocal value of the dielectric constant of the solvent. The heat effects of mixing solutions having a common cation, which are all negative in water-rich solutions, become endothermic after a certain value of the dielectric constant is passed. The results are discussed in terms of the solute-solvent structural properties.
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H. Dautzenberg, W. Jaeger, J. Kötz, B. Philipp, Ch. Seidel and D. Stscherbina, Polyelectrolytes, Carl Hanser Verlag, Munich 1994.
G. Vesnaver, M. Rudež, C. Pohar and J. Žkerjanc, J. Phys. Chem., 88 (1984) 2411.
R. H. Wood and R. W. Smith, J. Phys. Chem., 69 (1965) 2974.
R. A. Horne, Water and Aqueous Solutions, John Wiley & Sons, New York 1972, p. 628.
J. Škerjanc and M. Pavlin, J. Phys. Chem., 81 (1977) 1166.
G. Vesnaver, M. Tatič and J. Škerjanc, J. Chem. Soc., Faraday Trans. I, 79 (1983) 699.
C. Pohar and K. Arh, J. Solution Chem., 27 (1998) 1033.
T. F. Young, Y. C. Wu and A. A. Krawetz, Discuss. Faraday Soc., 24 (1957) 37.
R. M. Fuoss, A. Katchalsky and S. Lifson, Proc. Natl. Acad. Sci. U. S., 37 (1951) 578.
G. E. Boyd, F. Vaslow and J. W. Chase, J. Chem. Phys., 71 (1967) 3879.
K. Otrin Debevc, C. Pohar and V. Vlachy, J. Solution Chem., 25 (1996) 787.
C. H. Patience, M. A. Kahlow, T. M. Bender and J. S. Johnson, Jr., J. Phys. Chem., 88 (1984) 4152.
H. S. Frank and W. Y. Wen, Discuss. Faraday Soc., 24 (1957) 133.
J. E. Desnoyers, M. Arel, G. Perron and C. Jolicoœur, J. Phys. Chem., 73 (1969) 3346.
K. Otrin Debevc and C. Pohar, unpublished data.
R. H. Wood and H. L. Anderson, J. Phys. Chem., 71 (1966) 1871.
T. M. Fabry and R. M. Fuoss, J. Phys. Chem., 68 (1963) 971.
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Pohar, C., Arh, K. & Škufca, K. Heats of Mixing of Mixed Solvent Solutions of Alkali Metal Salts of Substituted Benzenesulfonic Acids. Journal of Thermal Analysis and Calorimetry 64, 707–712 (2001). https://doi.org/10.1023/A:1011540310838
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DOI: https://doi.org/10.1023/A:1011540310838