The Free Energy of Hydration of Gaseous Ions, and the Absolute Potential of the Normal Calomel Electrode
- 1 February 1939
- journal article
- conference paper
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 7 (2) , 108-111
- https://doi.org/10.1063/1.1750387
Abstract
The free energies of hydration of the alkali and halide ions are found to agree reasonably well with the simple expression of Born (—ΔF=(1–1/D)Ne2/2re) for solution of charged spheres in a dielectric medium, provided the crystal radii are suitably modified so as to correspond to the radii of the cavities in the dielectric medium. The results show that the dielectric constant of water remains large even in the intense field next to the ion. The entropies of hydration are also found to be consistent with these radii. Because of the simplicity of this calculation, the resulting free energies of solution of individual ions are considered to be a priori the most probable and are used to calculate a value of —0.50 volt for the absolute potential of the calomel half‐cell.Keywords
This publication has 11 references indexed in Scilit:
- The Entropies of Aqueous IonsJournal of the American Chemical Society, 1938
- The dielectric properties of aqueous solutions of saltsTransactions of the Faraday Society, 1938
- The Entropy of Aqueous Ions and the Nature of the Entropy of Hydration.Chemical Reviews, 1936
- Ionic radii and heat of hydrationTransactions of the Faraday Society, 1936
- A Theory of Water and Ionic Solution, with Particular Reference to Hydrogen and Hydroxyl IonsThe Journal of Chemical Physics, 1933
- THE THEORETICAL EVALUATION OF THE ENTROPIES OF AQUEOUS IONSJournal of the American Chemical Society, 1929
- THE SIZES OF IONS AND THE STRUCTURE OF IONIC CRYSTALSJournal of the American Chemical Society, 1927
- THE FREE ENERGY OF HYDRATION OF IONS AND THE ELECTROSTRICTION OF THE SOLVENTJournal of the American Chemical Society, 1926
- The Photo-Electric Threshold for MercuryPhysical Review B, 1925
- A DETERMINATION OF ABSOLUTE SINGLE ELECTRODE POTENTIALSJournal of the American Chemical Society, 1923