Chapter 14 Outline

Chapter 14 Outline - Joseph Chapter 14 Outline: Chemical...

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Joseph Chapter 14 Outline: Chemical Kinetics Chemical kinetics is the study of the rates at which reactions proceed and the study of the pathways reactions follow to move from reactants to products. There are four major factors that affect reaction rates: the physical states of the reactants, component concentrations, temperature, and catalysts (if present). Most reactions require at least two species to come together at some point in a reaction (decomposition reactions are a rare exception to this rule). The rate of reaction is also affected by the energy required to get the process started. Catalysts reduce this energy. Changes in temperature affect both factors. Rates of reactions can be determined by monitoring the change in concentration of either reactants or products as a function of time. All reactions slow down over time. Therefore, the best indicator of the rate of a reaction is the instantaneous rate near the beginning. One can gain information about the rate of a reaction by seeing how the rate changes with changes in concentration. A rate law shows the relationship between the reaction rate and the concentrations of reactants. For gas-phase reactants use P A instead of [A]. k is a constant that has a specific value for each reaction. The value of k is determined experimentally.
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Chapter 14 Outline - Joseph Chapter 14 Outline: Chemical...

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