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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > July  >
Research: Science and Education
Equations of State and Phase Diagrams
L. Glasser
Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, P. O. Wits 2050, South Africa
Cover
July 2002
Vol. 79 No. 7
p. 874
Abstract
Equations of state (for example, the ideal gas equation) contain three (or more) variables and should therefore be graphically represented by three (or more!)-dimensional diagrams. Three-dimensional diagrams and models are quite common for single-phase systems, but multiphase systems are usually displayed in projection or simply sketched. Here, we present a three-dimensional phase diagram based on authentic experimental data for a unary system, carbon dioxide, with its solid, liquid and vapor phases. Such an authentic diagram appears not to have been presented before, and may improve the understanding of phase relationships.

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More Information
*
Citation
Glasser, L. J. Chem. Educ. 2002, 79, 874.
*
Keywords
Materials Science; Phase Transitions / Diagrams; Physical Chemistry; Teaching / Learning Aids; Thermodynamics
*
History
Created:
Last Updated:
6/17/2002
7/7/2009
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