Realistic Thermodynamic Curves Describing a Second-Order Phase Transition

Paul W. R. Bessonette and Mary Anne White
Dalhousie University, Department of Chemistry, Halifax, Nova Scotia B3H 4J3, CANADA
J. Chem. Educ., 1999, 76 (2), p 220
DOI: 10.1021/ed076p220
Publication Date (Web): February 1, 1999

Abstract

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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  • Received: August 03, 2009

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