Entropy Physical Meaning

If an educated person has
 to be aware of the literary
 work of Shakespeare, then
 that person should also be
 aware of 'Entropy' concept.


Shakespeare and the Second Law * Dam the 2nd Law!

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Entropy SchPed*Entropy is a dim

www.kostic.niu.edu  is being updated from a legacy server - sorry for broken links referring to it!

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See also The Second Law and Special Issue NIUToday      Exploring the Second Law of Thermodynamics (Editor: Milivoje M. Kostic) Editorial > http://goo.gl/SNKdj4

      Entropy Generation Results of Convenience But without Purposeful Analysis and Due Comprehension—Editorial. Entropy 201618(1), 28doi: 10.3390/e18010028.
Kostic, M. (2016). 
Challenges to the Second Law Challengers SI

Entropy 201416953-967; doi:10.3390/e16020953


The Elusive Nature of Entropy and Its Physical Meaning

Milivoje M. Kostic 
Department of Mechanical Engineering, Northern Illinois University, DeKalb, IL 60115, USA; 
E-Mail: kostic@niu.edu; Tel.: +1-815-753-9975


ISSN 1099-4300


Special Issue




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Editorial Certificate 
Guidelines for Authors (HTM)


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Abstract: Entropy is the most used and often abused concept in science, but also in philosophy and society. Further confusions are produced by some attempts to generalize entropy with similar but not the same concepts in other disciplines. The physical meaning of phenomenological, thermodynamic entropy is reasoned and elaborated by generalizing Clausius definition with inclusion of generated heat, since it is irrelevant if entropy is changed due to reversible heat transfer or irreversible heat generation. …Click for Full Abstract ScienceIndex...Harvard...scoop.it/t/conscious-evolution



What is the underlying nature of “entropy” and why does it always increase? Why is entropy so intriguing and mysterious, unique and universal, as if it is a miraculous property of natural, material systems? How does it encompass and quantify all processes at all natural space and time scales, governed by the Second Law of Thermodynamics? And many other elusive and debatable issues, as if entropy is among the deepest unresolved mysteries in nature, defying our common sense.  

The intention of this treatise is not a review of vast entropy literature, but presentation of this author’s long-contemplated reflections on physical meaning of entropy, and to put certain physical and philosophical concepts in perspective. Only two seminal references and two related publications by the author, in addition to three popular references to illustrate certain misconceptions, are cited.  

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Nothing occurs locally, nor globally in the universe, without mass-energy exchange/conversion and entropy production. 
It is crystal-clear (to me) that all confusions related to the far-reaching fundamental Laws of Thermodynamics, and especially the 
Second Law (Abstract & FULL paper)are due to the lack of their genuine and subtle comprehension. > Sadi Carnot's Reflections <*> Clausius Theory of Heat < Reflections on Entropy, and Reflections on the Caloric Theory and Thermal Energy.

"Entropy is associated with stored-heat within a material system, i.e. its thermal energy. It is an integral measure of thermal energy per absolute temperature of a system. As heat is generated due to dissipation of any work potential to heat, the entropy is produced. However, if heat is converted to work (like in heat engines), the thermal energy is reduced while transferred to a lower-temperature thermal reservoir, however, the entropy (as ratio of thermal heat to absolute temperature) will not be reduced but conserved in ideal, reversible processes (Qrev/T=constCarnot Ratio Equality), or even the entropy will be produced (generated) in real (irreversible) processes for the amount of dissipated work-potential to stored heat (or thermal energy) per absolute temperature, regardless that the thermal energy is reduced (converted to work). Therefore, the entropy is always produced, locally and thus integrally or globally, and there is no way to destroy entropy, since it will be against the forced energy transfer from higher to lower potential [Kostic 2011 & 2014]."