Abstract
Density data are presented for benzoic, the toluic and 2,6-dimethylbenzoic acids and their sodium salts at temperatures from 5 to 65°C. Apparent and partial molar volumes have been calculated from the experimental data. From the partial molar volume data the volume change on substitution of a methyl group has been calculated as has the volume change on ionization of the acids. It is found that the volume contribution of a methyl group is somewhat dependent on the substituent position and on the temperature. The relation between volume change on ionization and the corresponding entropy change is presented for a range of temperature. The data support the idea that electrostriction is an important feature of these systems and that its importance increases with rising temperature.
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References
G. Perron and J. E. Desnoyers,Fluid Phase Equil. 2, 239 (1979);
J. E. Desnoyers, R. Pagé, G. Perron, J-L. Fortier, P-A. Leduc, and R. F. Platford,Can. J. Chem. 51, 2129 (1973).
L. G. Hepler,J. Phys. Chem. 69, 965 (1965).
J. C. Phillips,J. Phys. Chem. 89, 3060 (1985).
L. E. Strong, R. M. Neff, and I. Whitesel,J. Solution Chem. 18, 101 (1989).
L. E. Strong, D. J. Blubaugh, J. B. Kallmyer, and S. P. Taylor,J. Phys. Chem. 89, 1318 (1985).
L. E. Strong, T. G. Copeland, M. Darragh, and C. Van Waes,J. Solution Chem. 9, 109 (1980).
G. S. Kell,J. Chem. Eng. Data 20, 97 (1975).
O. Redlich and D. M. Meyer,Chem. Rev. 64, 221 (1964).
J. Ananthaswamy and G. Atkinson,J. Chem. Eng. Data 29, 81 (1984).
R. K. Mohanty, I. Basumallick, A. K. Das, and S. Bhowmik,J. Indian Chem. Soc. 63, 301 (1986).
N. Dollet, L. Avedikian, and J. Juillard,Can. J. Chem. 55, 3866 (1977).
H. C. Helgeson and D. H. Kirkham,Am. J. Sci. 276, 97 (1976).
E. J. King,J. Phys. Chem. 73, 1220 (1969).
L. M. Connaughton, J. P. Hershey, and F. J. Millero,J. Solution Chem. 15, 989 (1986).
J. P. Hershey, R. Damesceno, and F. J. Millero,J. Solution Chem. 13, 825 (1984).
R. Pogue and G. Atkinson,J. Chem. Eng. Data 33, 495 (1988).
T. M. Herrington, A. D. Pethybridge, and M. G. Roffey,J. Chem. Eng. Data 30, 264 (1985).
F. Shahidi,J. Chem. Soc. Faraday Trans. I 77, 1511 (1981).
L. G. Hepler,Can. J. Chem. 47, 4613 (1969).
F. J. Millero,Chem. Rev. 71, 147 (1971).
M. Sakurai, T. Komatsu, and T. Nakagawa,Bull. Chem. Soc. Jpn. 48, 3491 (1975).
R. Zana,J. Phys. Chem. 81, 1817 (1977).
H. Hoiland,J. Chem. Soc. Faraday Trans. I 70, 1180 (1974).
G. C. Allred and E. M. Woolley,J. Chem. Thermodyn. 13, 155 (1981).
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Strong, L.E., Bowe, M., White, J. et al. Volumetric properties of some methyl substituted benzoic acids and their sodium salts in water as a function of temperature. J Solution Chem 23, 541–560 (1994). https://doi.org/10.1007/BF00972743
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DOI: https://doi.org/10.1007/BF00972743