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Chemical kinetics is the study of how quickly chemical reactions proceed and the factors that affect the rate: o Nature and concentration of the reactants. Temperature. Presence of a catalyst. Rates of chemical reactions are usually defined by comparing the change in reactant or product concentration over time.
Order of Reactions. A reaction is zero order in a reactant if the change in concentration of that reactant produces no effect. A reaction is 1st order if doubling the concentration causes the rate to double. A reaction is 2nd order if doubling the concentration causes a quadruple increase in rate.
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Introduction. Chemical reaction kinetics deals with the rates of chemical processes. Any chemical process may be broken down into a sequence of one or more single-step processes known either as elementary processes, elementary reactions, or elementary steps.
1 Φεβ 2017 · The rate equation relates mathematically the rate of reaction to the concentration of the reactants. For the following reaction, aA + bB products, the generalised rate equation is: r = k[A] m [B] n
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The rate laws are of importance since they provide analytical expressions for the course of individual reactions and enable us to calculate expected yields and optimum conditions for “economic” processes.
