rate constant
"The rate of a chemical reaction is proportional to the product of the concentrations of all the reactants taking part in the reaction, with the ""rate constant"" the proportionality factor. In other words, the rate constant is the rate of the reaction when all reactants are present in unit concentration. The rate constant of a chemical reaction is a function of temperature and pressure. For an electrode reaction the rate constant is also a function of the electrode potential. " | ||||
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Rate constant Definition from Science & Technology Dictionaries & Glossaries
| General Chemistry Glossary |
rate constant
(k) A rate constant is a proportionality constant that appears in a rate law . For example, k is the rate constant in the rate law d[A]/dt = k[A]. Rate constants are independent of concentration but depend on other factors, most notably temperature.
(k) A rate constant is a proportionality constant that appears in a rate law . For example, k is the rate constant in the rate law d[A]/dt = k[A]. Rate constants are independent of concentration but depend on other factors, most notably temperature.
Rate constant Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Rate coefficient
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:
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...
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