Thermodynamics of steady states: A weak entropy-production principle
1974; Elsevier BV; Volume: 72; Issue: 2 Linguagem: Inglês
10.1016/0031-8914(74)90034-2
ISSN1873-1767
Autores Tópico(s)thermodynamics and calorimetric analyses
ResumoAbstract Two classes of steady-state situations, a family of chemical reaction schemes and the simple gradient situations (heat conduction, diffusion, Poiseuille flow of a fluid), are exhibited such that each member of each class fails to satisfy the principle of minimum entropy production outside the linear current-affinity region but nevertheless satisfies unrestrictedly a weaker form of entropy-production principle. A necessary and sufficient condition for the validity of the weak entropy-production principle is established. The weak entropy-production principle is necessarily valid for all situations involving linear kinetic laws (whether involving magnetic and centrifugal fields or not) but is not necessarily valid for situations involving nonlinear kinetic laws (special case counterexamples can be constructed).
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