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A New Look at Reaction Rates

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Tomislav Cvitas

Physical Chemistry Laboratory, University of Zagreb, POB 163, HR-10001 Zagreb, Croatia

J. Chem. Educ., 1999, 76 (11), p 1574

DOI: 10.1021/ed076p1574

Publication Date (Web): November 1, 1999

Abstract

Both rates of radioactive decays and rates of chemical reactions can be thought of as numbers of transformations per time. The rate of reaction, as an intensive quantity characteristic of the process, is obtained by dividing the amount of chemical transformations per time by the volume of the reaction system. The practical definition of the reaction rate found in the literature can then be derived by defining the stoichiometric numbers as changes in the number of specific molecules taking part in the reaction per chemical transformation. The name concentration of chemical transformations is introduced for what was previously called reaction variable. It is suggested that the conceptual definition of the advancement of reaction and reaction rate be introduced in general chemistry courses.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Physical Chemistry

Keywords (Pedagogy):

Textbooks / Reference Books

Keywords (Subject):

Kinetics

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

What Is a Reaction Rate?
Guy Schmitz
Journal of Chemical Education2005 82 (7), 1091
- What Is a Reaction Rate?
  Guy Schmitz
  Journal of Chemical Education2005 82 (7), 1091
  Experimentally, the rates of reactant consumption or rates of product formation are measured. These rates are related to, but different from, reaction rates. A reaction rate is a property of a given reaction, not of chemical species. The relationships ...
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