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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > July  >
In the Laboratory
Binary Solid-Liquid Phase Diagrams of Selected Organic Compounds. A Complete Listing of 15 Binary Phase Diagrams
Jürgen Gallus, Qiong Lin, Andreas Zumbühl, Sebastian D. Friess, Rudolf Hartmann, and Erich C. Meister
Physical Chemistry Laboratory, Swiss Federal Institute of Technology, ETH Zentrum, CH-8092 Zurich, Switzerland
Cover
July 2001
Vol. 78 No. 7
p. 961
Abstract
The investigation of multicomponent solid-liquid equilibria is of considerable importance in chemistry and materials science. Thus the determination of phase diagrams is a standard experiment in most undergraduate physical chemistry laboratory courses. This article proposes a simple and low-cost apparatus that allows accurate and reproducible measurements in a broad temperature range. Fifteen solid-liquid phase diagrams of binary systems that result from the systematic combination of six aromatic hydrocarbons are summarized. The aromatic hydrocarbons selected are easily accessible and melt in a convenient temperature range. The phase diagrams can be described within the experimental accuracy by the theoretical behavior of ideal systems with no solid solubility. This material is particularly well suited for a laboratory course, to illustrate the concepts of inhomogeneous equilibria with a large number of systems.
More Information
*  Citation
 Gallus, J¨rgen; Lin, Qiong; Zumb¨hl, Andreas; Friess, Sebastian D.; Hartmann, Rudolf; Meister, Erich C. J. Chem. Educ. 2001 78 961.
*  Keywords
 Equilibrium; Laboratory Equipment / Apparatus; Laboratory Instruction; Phase Transitions / Diagrams; Physical Chemistry; Thermal Analysis; Thermodynamics
*  History
 Created:
Last Updated:		 June 6, 2001
August 31, 2005
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