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Thermodynamic equilibrium



A thermodynamic system that is in thermal equilibrium, mechanical equilibrium, and chemical equilibrium.


A thermodynamic system is in equilibrium when there are:

(1) Thermal equilibrium : when two systems in thermal contact with each other do not exchange energy by heat since their temperatures are the same.

(2) Mechanical equilibrium : when pressures of the two systems are the same.

(3) Chemical equilibrium : when chemical potentials of the two systems are the same.

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Re: What is the chemical activity of a subtance

... do not behave quite like their ideals (e.g. ideal gasses) when their thermodynamic parameters are measured and related by thermodynamic equations, e.g. those for equilibrium or free energy. The activity is like a "corrected" concentration. ...

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by jonmoulton
Thu Dec 04, 2008 6:32 pm
Forum: General Discussion
Topic: What is the chemical activity of a subtance
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The Fiber Disease

... This will lead to solute concentration gradients that are far from thermodynamic equilibrium. The focus of this paper is on these regulatory mechanisms and their specific physiological ...

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