Similarity and Difference in the Behavior of Gases: An Interactive Demonstration

Guy Ashkenazi
Department of Science Teaching, The Hebrew University, Jerusalem 91904, Israel
James S. Gordon
Division of Science and Mathematics, Central Methodist University, Fayette, MO 65248
Jason D. Hofstein
Department of Chemistry and Biochemistry, Siena College, Loudonville, NY 12211
J. Chem. Educ., 2008, 85 (1), p 72
DOI: 10.1021/ed085p72
Publication Date (Web): January 1, 2008
History, Education, and Documentation

Abstract

Previous research has documented a gap in students' understanding of gas behavior between the algorithmic–macroscopic level and the conceptual–microscopic level. A coherent understanding of both levels is needed to appreciate the difference in properties of different gases, which is not manifest in the ideal gas law. A demonstration that concurrently exposes both the difference and similarity in the behavior of two different gases was designed for this purpose. Instructions for performing the demonstration in an interactive manner are given. The theory of "knowledge in pieces" is used to analyze students' active participation and justify the proposed delivery method.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Demonstrations

Keywords (Feature):

JCE DigiDemos: Tested Demonstrations

Keywords (Pedagogy):

Misconceptions / Discrepant Events

Keywords (Subject):

Gases
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History

  • Received: August 03, 2009

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