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The Painting-Sponging Analogy for Chemical Equilibrium
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Abstract
An analogy for chemical equilibrium is presented, in which high school or younger students can follow the advance towards equilibrium and its final dynamic nature. The relative opposition between forward and backward processes in a real chemical reaction is exemplified by the distance of a road line that is painted by one person and erased by another, both with different skills and working speeds. The graphical results of the progress of the line distance is entirely similar to the increasing of products concentration in a chemical reaction starting from the reactants. In the analogy, the final equilibrium position is independent of the starting point, as well as in a real chemical process. A simple basic program is included for interactive learning purposes.
Keywords (Audience):
High School / Introductory ChemistryKeywords (Domain):
Physical ChemistryKeywords (Feature):
Applications and AnalogiesKeywords (Pedagogy):
Computer-Based LearningKeywords (Subject):
EquilibriumCiting Articles
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This article has been cited by 6 ACS Journal articles (5 most recent appear below).
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Paul D. Buckley , John A. HarrisonJournal of Chemical Education2000 77 (8), 1013A first-order reversible reaction is simulated on an overhead projector using small coins or discs. A simulation is carried out in which initially there are 24 discs representing reactant A and none representing reactant B. At the end of each minute half ...
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- Received: August 03, 2009
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