Discovering the Thermodynamics of Simultaneous Equilibria. An Entropy Analysis Activity Involving Consecutive Equilibria.

• Autores: Thomas H. Bindel
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 84, Nº 3, 2007, págs. 449-452
• Idioma: inglés
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• Resumen

  • An activity is presented in which the thermodynamics of simultaneous, consecutive equilibria are explored. The activity is appropriate for second-year high school or AP chemistry. Students discover that a reactant-favored (entropy-diminishing or endergonic) reaction can be caused to happen if it is coupled with a product-favored reaction of sufficient entropy production or exergonicity. A variety of six product-favoring reactions are individually coupled with the reactant-favored reaction. The experimental results are correlated with the change in the entropies of the universe (?Suniv), the change in the standard-state free energies (?rG°), and the various equilibrium constants (K).