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18 Cards in this Set
- Front
- Back
reaction rate
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The change in concentration of a recatant or product per unit time. Unit: mol/(L·s).
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collision theory
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States that atoms, ions, and molecules must collide in order to react.
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activated complex
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A temporary, unstable arrangement of atoms that may form products or may break apart to re-form the reactants.
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transition state
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The activated complex.
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activation energy
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The minimum amount of energy that reacting particles must have to form the activated complex and lead to a reaction. Represented by (E_a).
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catalyst
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A substance that increases the rate of a chemical reaction without itself being consumed in the reaction.
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inhibitor
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A substance that slows down, or inhibits, reaction rates.
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heterogeneous catalyst
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Exists in a physical state different than that of the reaction it catalyzes.
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homogeneous catalyst
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Exists in the same physical state as the reaction it catalyzes.
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rate law
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The equation that expresses the mathematical relationship between the rate of a chemical reaction and the concentration of reactants.
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specific rate constant
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A numerical value that relates reaction rate and concentration of reactants at a given temperature.
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reaction order
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Defines how the rate is affected by the concentration of that reactant.
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method of initial rates
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Determines reaction order by comparing the initial rates of a reaction carried out with varying reactant concentrations.
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instantaneous rate
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The rate of decomposition at a specific time.
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complex reaction
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A reaction that consists of two or more elementary steps.
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reaction mechanism
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The complete sequence of elementary steps that make up a complex reaction.
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intermediate
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A substance produced in one elementary step and consumed in a subsequent elementary step.
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rate-determining step
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The slowest of the elementary steps in a complex reaction.
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