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rate or rate of reaction for a reactant or product in a
particular reaction is intuitively defined as how fast a
reaction takes place. For example, the oxidation of iron under
the atmosphere is a slow reaction which can take many years, but
the combustion of butane in a fire is a reaction that takes
place in fractions of a second. Chemical kinetics is the part of
physical chemistry that studies reaction rates. The concepts of
chemical kinetics are applied in many disciplines, such as
chemical engineering, enzymology and environmental engineering.
Formal definition of reaction rate Consider a typical chemical
reaction: The lowercase letters (a, b, p, and q) represent
stoichiometric coefficients, while the capi