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Thermodynamic Measure for Nonequilibrium Processes

Author

Listed:
  • Katalin Martinás

    (Department of Atomic Physics, Eötvös Loránd University,)

  • Attila Grandpierre

    (Konkoly Observatory of the Hungarian Academy of Sciences)

Abstract

One of the most fundamental laws of Nature is formulated by the Second Law of Thermodynamics. At present, in its usual formulation the central concept is entropy characterized in terms of equilibrium state variables. We point out that because thermodynamic changes arise when systems are out of equilibrium and because entropy is not a natural state variable characterizing non-equilibrium states, a new formulation of the Second Law is required. In this paper, we introduce a new, more general, but still entropic measure that is suitable in non-equilibrium conditions as well. This new entropic measure has given a name extropy. The introduction of extropy allows us to formulate the Second Law in a more suitable and precise form, and it resolves some conceptual difficulties related to the interpretation of entropy. We point out that extropy has a fundamental significance in physics, in biology, and in our scientific worldview.

Suggested Citation

  • Katalin Martinás & Attila Grandpierre, 2007. "Thermodynamic Measure for Nonequilibrium Processes," Interdisciplinary Description of Complex Systems - scientific journal, Croatian Interdisciplinary Society Provider Homepage: http://indecs.eu, vol. 5(1), pages 1-13.
    • Handle: RePEc:zna:indecs:v:5:y:2007:i:1:p:1-13
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    References listed on IDEAS

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    1. Gaveau, B. & Martinás, K. & Moreau, M. & Tóth, J., 2002. "Entropy, extropy and information potential in stochastic systems far from equilibrium," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 305(3), pages 445-466.
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    Cited by:

    1. Attila Grandpierre, 2012. "Entropy, Extropy and the Physical Driver of Irreversibility," Interdisciplinary Description of Complex Systems - scientific journal, Croatian Interdisciplinary Society Provider Homepage: http://indecs.eu, vol. 10(2), pages 73-79.
    2. repec:zna:indecs:v:10:y:2012:i:1:p:73-79 is not listed on IDEAS

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    More about this item

    Keywords

    entropy; thermodynamics; extropy; irreversibility;
    All these keywords.

    JEL classification:

    • C69 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Other

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