Standard state entropies of the aqueous rare earth ions

Autor:	Joseph A. Rard, Frank H. Spedding, Anton Habenschuss
Rok vydání:	1977
Předmět:	Activity coefficient Ionic radius Aqueous solution Chemistry General Engineering Solvation Ionic bonding Thermodynamics Ion Dilution Crystal Physical chemistry Physics::Chemical Physics Physical and Theoretical Chemistry
Zdroj:	The Journal of Physical Chemistry. 81:1069-1074
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100526a009
Popis:	Recently data have become available for the activity coefficients of 14 rare earth chlorides, and for the heats of dilution of 13 rare earths chlorides, from dilute solution to saturation at 25/sup 0/C. In addition, new heats of solution data have been reported for the hydrated crystals of 13 of the rare earth chlorides. These data have been used here, together with crystal entropy data, to calculate standard state ionic entropies for the rare earth ions in aqueous solution. The standard state ionic entropies form two series when plotted against the inverse square of the ionic radius of the rare earth ion. The S shape of this series curve was found to be consistent with a decrease in the rare earth ion's inner-sphere hydration number between Nd and Tb, and with an increase in total ionic hydration from La to Lu.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::34a8a0eac69c1db3f14a3ac69fe2080e https://doi.org/10.1021/j100526a009 Zobrazit plný text záznamu