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Andrew M. Steane

Print publication date: 2016

Print ISBN-13: 9780198788560

Published to Oxford Scholarship Online: January 2017

DOI: 10.1093/acprof:oso/9780198788560.001.0001

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Stability and free energy

Stability and free energy

(p.243) 17 Stability and free energy

Andrew M. Steane

Oxford University Press

The treatment of out of equilibrium systems is introduced, and the conditions for stable equilibrium derived. The minimum energy principle is derived. The convex shape of the entropy function is explained, and Le Chatelier’s principle is given. The relation between entropy and phase change is explained. Free energy is considered afresh, as a suitable way of treating equilibrium conditions under various constraints. Availability is defined and used. The general concept of a system finding its equilibrium via the adjustment of internal parameters is described.

Keywords:   Out of equilibrium, stability conditions, minimum energy principle, convex function, Le Chatelier, free energy, availability

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