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  Home > JCE Print > Journal of Chemical Education > Issues > 2006  > January  >
Research: Science and Education
Advanced Chemistry Classroom and Laboratory
A Generalized Deduction of the Ideal-Solution Model
Teresa J. Leo and Pedro Pérez-del-Notario
Departamento Motopropulsión y Termofluidodinámica, E.T.S.I. Aeronáuticos, Universidad Politécnica de Madrid, 28040-Madrid, Spain

Miguel A. Raso
Departamento Química Física I, Fac. CC. Químicas, Universidad Complutense de Madrid, 28040-Madrid, Spain
Cover
January 2006
Vol. 83 No. 1
p. 145
Abstract
This article proposes a new way of introducing the ideal solution model. It is intended to replace the usual inductive method, whereby the mixing functions are derived from knowledge of ideal-gas mixtures, with a deductive method based on principles of macroscopic thermodynamics. This is considered a good way to teach the thermodynamics of mixtures to advanced students, whose mathematical background enables them to grasp other disciplines in a general way. The first step is to obtain a general expression for the Gibbs energy of mixing without recourse to particular cases of mixtures. Then, from this general expression an important feature is deduced: for any mixture with no interaction between its components the mathematical form of the Gibbs energy of mixing must contain terms like xilnxi, irrespective of whether the aggregation state of the system is solid, liquid, or gas.
More Information
*  Citation
 Leo, Teresa J.; Pérez-del-Notario, Pedro; Raso, Miguel A. J. Chem. Educ. 2006 83 145.
*  Keywords
 Chemical Engineering; Graduate Education / Research; Physical Chemistry; Solutions / Solvents; Textbooks / Reference Books; Thermodynamics
*  History
 Created:
Last Updated:		 12/1/2005
12/7/2005
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