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CHM152C

Ch. 13

QuestionAnswer
Kinetics the study of the factors that affect the speed of a reaction and the mechanism by which a reaction proceeds
half-life (t1/2) The time required for the concentration of a reactant or the amount of a radioactive isotope to fall to one-half of its initial value.
activation energy An energy barrier in a chemical reaction that must be overcome for the reactants to be converted into products.
reaction order A value in the rate law that determines how the rate depends on the concentration of the reactants.
rate law A relationship between the rate of a reaction and the concentration of the reactants.
Molecularity The number of reactant particles involved in an elementary step.
elementary step An individual step in a reaction mechanism.
reaction mechanism A series of individual chemical steps by which an overall chemical reaction occurs.
collision theory A model of chemical reactions in which a reaction occurs after a sufficiently energetic collision between two reactant molecules.
intermediate species produced and consumed in a chemical reaction and doesn’t appear in the overall equation
transition state (activated complex) A high-energy intermediate state between reactant and product.
catalyst A substance that is not consumed in a chemical reaction, but increases the rate of the reaction by providing an alternate mechanism in which the rate-determining step has a smaller activation energy.
Created by: akatier23
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