Abstract
The enthalpies of dilution of aqueous solutions of formamide, acetamide, propionamide,N,N-dimethylformamide, and sucrose have been measured from about 0.15 to 2.0 moles-kg−1 at 25.0°C. The results of the enthalpy measurements were used to calculate the pairwise enthalpies of interaction for each compound with itself. The equation of Savage and Wood together with their interaction parameters are used to predict the experimental results. All of the predictions are within the standard deviation of the original correlation of Savage and Wood (±220 J-kg-mole−2). Detailed examination of the results shows that specific effects are present but they are less than 220 J-kg-mole−2. Results on urea and substituted ureas are used to determine interaction coefficients for a urea group with itself and with another CH 2 group. The result,H U,U =−280 andH U,CH 2 =29 J-kg-mole−2, is an improvement on the previous arbitrary assignment of parameters for urea interactions.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. J. Savage and R. H. Wood,J. Solution Chem. 5, 733 (1976).
B. Y. Okamoto, R. H. Wood, and P. T. Thompson,J. Chem. Soc. Faraday Trans. 1 74, 1990 (1978).
J. C. Verhoef and E. Barendrecht,Anal. Chem. Acta 94, 395 (1977).
I. Wadsö,Acta Chem. Scand. 22, 927 (1968).
P. T. Thompson, D. E. Smith, and R. H. Wood,J. Chem. Eng. Data 19, 386 (1974).
E. Lange and K. Mohring,Z. Elektrochem. 57, 660 (1953).
F. T. Gucker, Jr., H. B. Pickard, and R. W. Planck,J. Am. Chem. Soc. 61, 459 (1939).
G. C. Kresheck,J. Phys. Chem. 73, 2441 (1969).
J. J. Kozak, W. S. Knight, and W. Kauzmann,J. Chem. Phys. 48, 675 (1968).
H. L. Friedman and C. V. Krishnan,J. Solution Chem. 2, 119 (1973).
F. Franks, M. Pedley, and D. S. Reid,J. Chem. Soc. Faraday Trans. 1 72, 359 (1976).
G. Barone, G. Castronuova, V. Crescenzi, V. Elia, and E. Rizzo,J. Solution Chem. 7, 179 (1978).
G. Barone, G. Castronuovo, V. Elia, and A. Menna,J. Solution Chem. 8, 157 (1979).
G. Barone, private communication.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wood, R.H., Hiltzik, L.H. Enthalpies of dilution of aqueous solutions of formamide, acetamide, propionamide, andN,N-dimethylformamide. J Solution Chem 9, 45–57 (1980). https://doi.org/10.1007/BF00650136
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00650136