Author:
Donohue Marc D.,Prausnitz John M.
Abstract
For liquid solutions, the combinatorial entropy of mixing is commonly calculated using either (a) the ideal-solution model (suitable for mixtures of simple spherical molecules) or (b) the Flory lattice model (suitable for mixtures of chainlike molecules). Based on the lattice theories of Huggins, Staverman, Tompa, and Lichtenthaler for molecules of arbitrary size and shape, this work proposes an adhoc generalization of Flory's formula for the combinatorial entropy of mixing in binary and multicomponent solutions. The generalized Flory model yields results that are always intermediate between those obtained from (a) and (b). Parameters re quired for the calculations are found from molecular structure data (bond angles and distances). Illustrative calculations are given for the system carbon tetrachloride – octamethylcyclotetrasiloxane.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
74 articles.
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