Thermodynamics and Energy


The Concept of System and the Physical Significance of the Quantities Work and Heat

Authors: Rodrigo de Abreu

In this paper the concept of system is related to the concepts of entropy, work and heat. Through the analysis of three models it is shown that the arbitrariness in the choice of the system is related to the existence of parts of the Universe whose energy is only a function of the deformation variables. For this reason those parts may or may not be included in the system or in the work term. With this in mind we propose a new interpretation of the quantity heat and a non orthodox enunciation of the Second Principle of Thermodynamics.

Comments: 4 Pages. Técnica 1, 50-53 (1987).

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[v1] 2015-03-30 12:49:34

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