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Essentials of Chemical Reaction Engineering by H. Scott Fogler

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3.2.1 Power Law Models and Elementary Rate Laws

The dependence of the reaction rate, –rA, on the concentrations of the species present, fn(Cj), is almost without exception determined by experimental observation. Although the functional dependence on concentration may be postulated from theory, experiments are necessary to confirm the proposed form. One of the most common general forms of this dependence is the power law model. Here the rate law is the product of concentrations of the individual reacting species, each of which is raised to a power, for example,

3-3

image

The exponents of the concentrations in Equation (3-3) lead to the concept of

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