Reaction Rate Essay

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Chemical Kinetics * Chemical kinetics, also known as reaction kinetics, is the study of rates of chemical processes. * Chemical kinetics includes investigations of how different experimental conditions can influence the speed of a chemical reaction and yield information about the reaction's mechanism and transition states, as well as the construction of mathematical models that can describe the characteristics of a chemical reaction. * Chemical kinetics deals with the experimental determination of reaction rates from which rate laws and rate constants are derived. * Chemical kinetics is the branch of chemistry which addresses the question: "how fast do reactions go?" Reaction Rate * The rate of reaction is a positive quantity that expresses how the concentration of a reactant or product changes with time. * For changes in amounts, the units can be one of mol/s, g/s, lb/s, kg/day etc. For changes in concentrations, the units can be one of mol/(L s), g/(L s), %/s etc. * With respect to reaction rates, we may deal with average rates, instantaneous rates, or initial rates depending on the experimental conditions. * The rate of reaction depends on the type of molecules that are combining. * There is another big idea for rates of reaction called collision theory. The collision theory says that the more collisions in a system, the more likely combinations of molecules will happen. If there are a higher number of collisions in a system, more combinations of molecules will occur. The reaction will go faster, and the rate of that reaction will be higher. * In order for a reaction to proceed, the reactant particles must: * Collide with sufficient energy to break any bonds in the reactant particles. The activation energy is the minimum amount of energy the colliding reactant particles must have in order for products to

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