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A nonrandom factor model for the excess gibbs energy of electrolyte solutions
Author(s) -
Haghtalab A.,
Vera J. H.
Publication year - 1988
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.690340510
Subject(s) - electrolyte , thermodynamics , work (physics) , saturation (graph theory) , chemistry , range (aeronautics) , gibbs free energy , statistical physics , debye–hückel equation , activity coefficient , physics , materials science , mathematics , electrode , combinatorics , aqueous solution , composite material
A new approach to represent the deviations from ideality of electrolyte solutions is derived on the basis of the assumptions of specific interactions of Brönsted and of local electroneutrality of Chen. The model consists of two contributions due to long‐range forces, represented by the Debye‐Hückel theory, and to short‐range forces, represented by local compositions through nonrandom factors. With only two adjustable parameters per electrolyte, the model is valid for the whole range of electrolyte concentration, from dilute solution up to saturation. Results are compared with those obtained from two‐parameter or one‐parameter models of Meissner, Bromley, Pitzer, and Chen et al. The model presented in this work consistently produces better results and reproduces the experimental values from the dilute region up to saturation.