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Formation and Dimerization of NO2 A General Chemistry Experiment

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April D. Hennis , C. Scott Highberger and Serge Schreiner

Randolph Macon College, Department of Chemistry, Ashland, VA 23005

J. Chem. Educ., 1997, 74 (11), p 1340

DOI: 10.1021/ed074p1340

Publication Date (Web): November 1, 1997

Section:

History, Education, and Documentation

Abstract

We have developed a general chemistry experiment which illustrates Gay-Lussac's law of combining volumes. Students are able to determine the partial pressures and equilibrium constant for the formation and dimerization of NO₂. The experiment can be carried out in about 45 minutes with students working in groups of two. The experiment readily provides students with data that can be manipulated with a common spreadsheet.

Keywords (Audience):

High School / Introductory Chemistry

Keywords (Domain):

Laboratory Instruction

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Gases

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This article has been cited by 2 ACS Journal articles (2 most recent appear below).

Approaching Equilibrium in the N2O4-NO2 System: A Common Mistake in Textbooks
I. A. Leenson
Journal of Chemical Education2000 77 (12), 1652
- Approaching Equilibrium in the N2O4-NO2 System: A Common Mistake in Textbooks
  I. A. Leenson
  Journal of Chemical Education2000 77 (12), 1652
  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: ...
  Abstract | Hi-Res PDF | PDF w/ Links
Why Equilibrium? Understanding Entropy of Mixing
Mary Jane Schultz
Journal of Chemical Education1999 76 (10), 1391
- Why Equilibrium? Understanding Entropy of Mixing
  Mary Jane Schultz
  Journal of Chemical Education1999 76 (10), 1391
  To help students understand entropy and the origin of equilibrium, it is useful to explicitly calculate the components of the Gibbs free energy. This can be done if the reaction is a gas-phase reaction at moderate pressure. In this case, reactants and ...
  Abstract | Hi-Res PDF | PDF w/ Links