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Glossary of Thermodynamics Terms
beginning with letter E
Browse the Thermodynamics Glossary
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enthalpy Tweet Definition of enthalpy Like Definition of enthalpy on Facebook
noun
  1. (physics) In thermodynamics, a measure of the heat content of a chemical or physical system
entropy Tweet Definition of entropy Like Definition of entropy on Facebook
noun (entrop, ies, -)
  1. (context, thermodynamics, countable)
  1. strictly thermodynamic entropy. A measure of the amount of energy in a physical system which cannot be used to do mechanical work.
  2. A measure of the disorder present in a system (now becoming obsolete in chemistry http://www.entropysite.com/).
  3. The capacity factor for thermal energy that is hidden with respect to temperature http://arxiv.org/pdf/physics/0004055.
  4. The dispersal of energy; how much energy is spread out in a process, or how widely spread out it becomes, at a specific temperature. http://www.entropysite.com/students_approach.html
    1. (context, statistics, information theory, countable) A measure of the amount of information and noise present in a signal.
    2. (uncountable) The tendency of a system that is left to itself to descend into chaos.
evolution Tweet Definition of evolution Like Definition of evolution on Facebook
noun
  1. (context, general) A gradual process of development, formation, or growth, esp. one leading to a more advanced or complex form.
  2. (biology) The change in the genetic composition of a population over successive generations.
  3. (mathematics) The extraction of a root from a quantity.
  4. (military) One of a series of ordered movements.
expansive Tweet Definition of expansive Like Definition of expansive on Facebook
adjective
  1. Able to be expanded.
  2. Comprehensive in scope or extent.
  3. Talkative and sociable.

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