CHEM102 Lecture Notes - Lecture 2: Rate Equation, Reaction Rate, Chemical Equation
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CHEM102 Full Course Notes
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Order of reaction n = the order of the reaction (or reaction order) with respect to no2. It can have a value of 0 (zero order) or any integers such as 1(first order), 2(second order) or 3 (third order). It can have negative value such as n = -1. It can have fractions, for example, n = 0. 5. The expression: rate of reaction = k[no2]n is the rate law or the rate equation. It is important to know that the order n does not have to relate to the stoichiometry of the chemical equation and must be determined experimentally. For this reason, we sometimes called it the experimental rate law. Measurement of reaction order provides important insight into the molecular detail (mechanism) of a reaction which we will see later. For reaction, aa + bb cc + dd. Rate of reaction = k[a]m[b]n m + n = overall order of the reaction. Reaction rate is independent on concentration of a.