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Representation of deviation from ideality in concentrated aqueous solutions of electrolytes using a mean spherical approximation molecular model
Author(s) -
Ball FrancoisXavier,
Planche Henri,
Fürst Walter,
Re Henri
Publication year - 1985
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690310802
Subject(s) - molality , helmholtz free energy , electrolyte , thermodynamics , osmotic coefficient , activity coefficient , aqueous solution , absolute deviation , representation (politics) , chemistry , statistical physics , mathematics , physics , statistics , electrode , politics , political science , law
A semiempirical expression for the Helmholtz energy of mixed electrolyte solutions in solvents mixtures is obtained from the solution of the mean spherical approximation given by Planche and Renon (1981) for a nonprimitive model of interactions. A consistent set of analytical equations for the related thermodynamic properties was further derived and used to represent osmotic coefficient data of strong aqueous electrolytes at 25°C. Data correlation was performed on more than 80 systems up to a 6 M molality using generally one adjustable parameter for each single electrolyte; from these parameters the properties of mixtures can be calculated in a predictive manner without additional parameters.