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The rate coefficient or rate constant of a chemical reaction is the coefficient that precedes reactant concentrations in a simple rate equation. For a chemical reaction n A + m B → n ' C + m ' D, with rate equation:
Additional recommended knowledge
k(T) is the reaction rate coefficient or rate constant.
Rate coefficient includes all factors that affect reaction rate, except for concentration, which is explicitly accounted for. Rate coefficient is therefore not constant; because of that reason the name rate coefficient is preferred over rate constant. Rate coefficient is mainly affected by temperature as described by Arrhenius equation but also, ionic strength, surface area of the adsorbent (for heterogeneous reactions), light irradiation...
The units of the rate coefficient depend on the global order of reaction:
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Rate_coefficient". A list of authors is available in Wikipedia.|