Conclusions
-
1.
The integral enthalpies of dissolution of 100% nitric acid in concentrated aqueous solutions of sulfuric acid\( - \Delta H_{HNO_3 } \) were measured calorimetrically at 298°K; when the concentration of H2SO4 was changed from 90.90 to 99.48% with\(C_{HNO_3 } \) = 0.1 mole/liter,\(\Delta H_{HNO_3 } \) changed from −4.4 to −8.4 kcal/mole.
-
2.
The heat of dilution of the sulfuric acid makes the basic contribution to the value of the integral heat of dissolution of 100% nitric acid in concentrated aqueous solutions of sulfuric acid.
-
3.
The value of the enthalpy of ionization of nitric acid in concentrated aqueous solutions of sulfuric acid (\(\Delta H_{HNO_2 } + _{ + HSO_4 } - \))was determined. The value of\(\Delta H_{HNO_2 } + _{ + HSO_4 } - \) with\(C_{HNO_3 } \) = 0.1 mole/liter decreased from 1.7 kcal/mole in 90.90% sulfuric acid to −0.3 to −0,5 kcal/mole in 99.48% sulfuric acid.
-
4.
In the starting 99.48% and 98.44% sulfuric acid, the values of\(\Delta H_{HNO_2 } + _{ + HSO_4 } - \)were almost independent of the concentration of nitric acid with concentrations of the acid of 0.05 to 1 mole/liter.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
J. Chedin, Ann. Chim. (France),8, 243 (1937).
C. K. Ingold, D. J. Millen, and H. G. Poole, J. Chem. Soc., 2576 (1950).
R. J. Gillespie, J. Graham, E. D. Hughes, C. K. Ingold, and E. R. A. Peeling, J. Chem. Soc., 2504 (1950).
C. K. Ingold, Theoretical Principles of Organic Chemistry [Russian translation], Mir, Moscow (1973).
N. C. Marziano, P. G. Traverso, A. De Santis, and M. Sampoli, J. Chem. Soc. Chem. Commun., 873 (1978).
N. B. Librovich, B. V. Rassadin, I. M. Medvetskaya, L. R. Andreeva, and M. I. Vinnik, Izv. Akad. Nauk SSSR, Ser. Khim., 1524 (1984).
N. C. Deno, H. J. Peterson, and E. Sacher, J. Phys. Chem., 199 (1961).
D. R. Goddard, E. D. Hughes, and C. K. Ingold, J. Chem. Soc., 2559 (1950).
I. M. Medvetskaya, Yu. N. Matyushln, T. S. Kon'kova, L. R. Andreeva, V. F. Zhilin, Yu. A. Lebedev, and M. I. Vinnik, Akad. Nauk SSSR, Ser. Khim., 1247 (1986).
Yu. A. Lebedev, Yu. N. Matyushin, T. S. Kon'kova, B. P. Larionov, and A. B. Vorob'ev, USSR Patent No. 726442, Byull. Izobret., No. 13 (1980).
Yu. N. Matyushin, T. S. Kon'kova, K. V. Titova, V. Ya. Rosolovskii, and Yu. A. Lebedev, Izv. Akad. Nauk SSSR, Ser. Khim., 498 (1982).
R. J. Gillespie and S. Wasif, J. Chem. Soc., 204 (1953).
R. S. Ryabova and M. I. Vinnik, Zh. Fiz. Khim.,47, 1999 (1973).
Yu. V. Karyakin and I. I. Angelov, Pure Chemical Reagents [in Russian], 4th ed., Moscow (1974), p. 163; F. M. Rapoport and A. A. Il'inskii, Laboratory Methods of Preparation of Pure Gases [in Russian], Moscow (1963), p. 209.
Handbook of Chemistry [in Russian], Vol. 3, Moscow-Leningrad (1952), pp. 363,376.
W. F. Giauque, E. W. Hornung, J. E. Kunzler, and T. R. Rubin, J. Am, Chem. Soc.,82, 62 (1960).
Author information
Authors and Affiliations
Additional information
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1252–1258, June, 1986.
Rights and permissions
About this article
Cite this article
Matyushin, Y.N., Medvetskaya, I.M., Okhlopkova, A.A. et al. Integral heats of dissolution and enthalpies of ionization of 100% nitric acid at 298°K. Communication 2. Concentrated aqueous solutions of sulfuric acid. Russ Chem Bull 35, 1135–1139 (1986). https://doi.org/10.1007/BF00956582
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00956582