Thermodynamics and Energy


Resolution of Two Entropy Maximization Controversies.

Authors: Rodrigo de Abreu

Irreversible interactions between two subsystems constituted by ideal gases are considered. Several processes conducting the gases to the final equilibrium point and the meaning of entropy production are analysed. If the interaction between the two subsystems results from the energy exchange through a fixed partition, it was demonstrated that the positive entropy production, the local law, is a consequence of the global entropy increase of the universe-it is not possible to have a negative entropy production. If the interaction results from the energy exchange netween the two subsystems through a moving partition it is not possible to define the entropy production generalising the expressions that can be attained for the first configuration. For the first case it is unnecessary. For the other it can not be defined. For the first case it gives a false interpretation [1, 2]. For the other it was the source of an impossibility statement that does not exist [3]. If this so, it is possible to understand what are the misconceptions and prejudices at the origin of two controversies [1-3]. [1] J. Belandria, J. Chem. Educ. 72, 116 (1995). [2] R. Battino, S. Wood, R. Freeman, L. Nash, W. Olivares, P. Colemenares, R. Tykody, J. Belandria, J. Chem. Educ. 74, 256 (1997). [3] A. Curzon and H. Leff, Am. J. Phys. 47, 385 (1979).

Comments: 19 Pages. EPS-11:Trends in Physics, London (1999).

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[v1] 2015-05-08 05:24:55

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