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Evaluation of the Atmospheric Chemical Entropy Production of Mars

Division of Space Technology, Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology, 98128 Kiruna, Sweden
Instituto Universitario de Física Fundamental y Matemáticas, Universidad de Salamanca, Casas del Parque, 37008 Salamanca, Spain
Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR), Avda. de Las Palmeras n 4, Armilla, 18100 Granada, Spain
Author to whom correspondence should be addressed.
Academic Editor: Kevin H. Knuth
Entropy 2015, 17(7), 5047-5062;
Received: 3 February 2015 / Revised: 11 July 2015 / Accepted: 14 July 2015 / Published: 20 July 2015
(This article belongs to the Section Thermodynamics)
Thermodynamic disequilibrium is a necessary situation in a system in which complex emergent structures are created and maintained. It is known that most of the chemical disequilibrium, a particular type of thermodynamic disequilibrium, in Earth’s atmosphere is a consequence of life. We have developed a thermochemical model for the Martian atmosphere to analyze the disequilibrium by chemical reactions calculating the entropy production. It follows from the comparison with the Earth atmosphere that the magnitude of the entropy produced by the recombination reaction forming O3 (O + O2 + CO2 ⥦ O3 + CO2) in the atmosphere of the Earth is larger than the entropy produced by the dominant set of chemical reactions considered for Mars, as a consequence of the low density and the poor variety of species of the Martian atmosphere. If disequilibrium is needed to create and maintain self-organizing structures in a system, we conclude that the current Martian atmosphere is unable to support large physico-chemical structures, such as those created on Earth. View Full-Text
Keywords: entropy production; disequilibrium; life; non-equilibrium thermodynamics; Mars entropy production; disequilibrium; life; non-equilibrium thermodynamics; Mars
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MDPI and ACS Style

Delgado-Bonal, A.; Martín-Torres, F.J. Evaluation of the Atmospheric Chemical Entropy Production of Mars. Entropy 2015, 17, 5047-5062.

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