Abstract
The concept of extent of reaction was discussed many times in physical chemistry journals and books. This contribution strongly suggests the use of the extent of reaction as standard basic tool in teaching stoichiometry. The same idea was suggested several times in the past without success because the concept of extent of reaction is still not presented in the first-year general chemistry textbooks. It is also remarked that the concept of extent of reaction represents a simple example of the way of attaining a mathematization of chemistry, that is chemistry thought and made with the mathematical way of thinking, i.e. using variables, symbols and functions. Presenting the concept of the extent of reaction within the general chemistry curriculum will support successive physical chemistry courses, as these courses make extensive use of this powerful concept when teaching thermodynamics and kinetics of chemical reactions.
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References
Atkins, P.W.: Physical Chemistry. Oxford University Press, Oxford (1992)
Boudart, M., Djéga-Mariadassou, G.: Kinetics of Heterogeneous Catalytic Reactions. Princeton University Press, Princeton (1984)
Bindel, T.H.: Understanding chemical equilibrium using entropy analysis: The relationship between ∆S tot (sys°) and the equilibrium constant. J. Chem. Educ. 87, 694–699 (2010)
Canagaratna, S.G.: The use of extent of reaction in introductory courses. J. Chem. Educ. 77, 52–54 (2000)
Canagaratna, S.G.: Approaches to the treatment of equilibrium perturbations. J. Chem. Educ. 80, 1211–1219 (2003)
Cohen, E.R., Cvitaš, T., Frey, J.G., Holstrom, B. (eds.): IUPAC definition in “Quantities, Units and Symbols in Physical Chemistry” (IUPAC Green Book), 3rd ed. Royal Chemical Society of Chemistry, Cambridge (2007); IUPAC Compendium of Chemical Terminology, Gold Book Version 2.3.1. 2012-03-23, p. 543. http://www.iupac.org. Accessed Jan 2014
Craig, N.C.: The chemists’ delta. J. Chem. Educ. 64, 668–669 (1987)
Croce, A.E.: The application of the concept of extent of reaction. J. Chem. Educ. 79, 506–509 (2002)
Cvitaš, T.: A new look at reaction rates. J. Chem. Educ. 76, 1574–1577 (1999)
Dumon, A., Lichanot, A., Poquet, E.: Describing chemical transformations. J. Chem. Educ. 70, 29–30 (1993)
Garst, J.F.: The Extent of reaction as a unifying basis for stoichiometry in elementary chemistry. J. Chem. Educ. 51, 194–196 (1974)
McQuarrie, D.A., Simon, J.D.: Physical Chemistry: A Molecular Approach. University Science Books, Sausalito (1997)
Peckham, G.D.: The extent of reaction, ∆ξ—some nuts and bolts. J. Chem. Educ. 78, 508–510 (2001)
Phillips, J.C.: A graphical representation of limiting reactant. J. Chem. Educ. 71, 1048 (1994)
Prigogine, I., Kondepudi, D.: Thermodynamique. Des moteurs thermiques aux structures dissipatives. Édition Odile Jacob, Paris (1999)
Restrepo, G.: To mathematize, or not to mathematize chemistry. Found. Chem. 15, 185–197 (2013)
Sostarecz, M.C., Sostarecz, A.G.: A conceptual approach to limiting-reagent problems. J. Chem. Educ. 89, 1148–1151 (2012)
Strong, F.C.: Faraday’s laws in one equation. J. Chem. Educ. 38, 98 (1961)
Treptow, R.S.: Free energy versus extent of reaction. J. Chem. Educ. 73, 51–54 (1996)
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The author thanks Andrea Ciccioli and Mauro Satta for a critical reading of the manuscript, the reviewers and the Editor for their useful comments and recommended revisions that improved the quality of this article.
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Moretti, G. The “extent of reaction”: a powerful concept to study chemical transformations at the first-year general chemistry courses. Found Chem 17, 107–115 (2015). https://doi.org/10.1007/s10698-014-9212-x
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DOI: https://doi.org/10.1007/s10698-014-9212-x