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1999
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February
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In the Classroom
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Realistic Thermodynamic Curves Describing a Second-Order Phase Transition
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Paul W. R. Bessonette and Mary Anne White
Dalhousie University, Department of Chemistry, Halifax, Nova Scotia B3H 4J3, CANADA
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February 1999
Vol. 76 No. 2
p. 220
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| Abstract |
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Phase transitions are commonly recognized in the context of links between the solid, liquid, and gaseous phases of a substance. When materials undergo phase transitions they can change their optical, thermal, electronic, magnetic, and/or mechanical properties, and therefore delineation of phase transitions and their driving forces can be very important in understanding properties of materials. Despite the number and variety of phase transitions that are observed, they are all thermodynamically bound by the common feature that the Gibbs energy function (G ) must be continuous upon passing through any phase transition. We consider the temperature dependence of G, H, S, Cp, and V for a variety of types of phase transitions and correct an error common to depiction of Ehrenfest second-order phase transitions in the introductory physical chemistry textbooks presently available.
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| More Information |
 Citation |
Bessonette, Paul W. R.; White, Mary Anne. J. Chem. Educ. 1999 76 220.
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Keywords |
Thermodynamics; Phase Transitions / Diagrams; Physical Chemistry; Chemical Education Research; Teaching/Learning Theory/Practice
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History |
Created:
Last Updated: |
June 15, 1999
June 22, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
1999
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February
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220
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