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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > December  >
Information, Textbooks, Media, Resources
Approaching Equilibrium in the N2O4-NO2 System: A Common Mistake in Textbooks
I. A. Leenson
Department of Chemistry, Moscow State University, Moscow 119899, Russia
Cover
December 2000
Vol. 77 No. 12
p. 1652
Abstract
The paper deals with a widespread mistake in standard textbooks--an experiment with a shift of the equilibrium in gaseous mixtures of nitrogen oxides upon abrupt compression. Any explanation of this experiment should take into account two facts: noticeable heating upon compression and extremely fast chemical reactions in the system (relaxation time is of the order of a microsecond). The paper presents experimental data on kinetics in the system approaching equilibrium and the calculations of the equilibrium mixture just after compression. The paper will be suitable for an in-class lecture activity and will be useful for teachers and students in general chemistry and physical chemistry courses (gas laws, chemical thermodynamics and kinetics).
More Information
*  Citation
 Leenson, I. A. J. Chem. Educ. 2000 77 1652.
*  Keywords
 Descriptive Chemistry; Equilibrium; Gases; Kinetics; Physical Chemistry; Problem-Based Learning; Teaching/Learning Theory/Practice; Textbooks; Thermodynamics
*  History
 Created:
Last Updated:		 November 3, 2000
April 15, 2005
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