A(n) ________ does not provide much information about how a reaction occurs.
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catalyst
A(n) ________ is a chemical that lowers the activation energy of a process, increasing the pace of the reaction.
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elementary step
The number of molecules reacting in a(n) ________ determines the reaction's molecularity.
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rate law
Which is defined as the sum of the powers to which all of the reactant concentrations in the ________ are elevated.
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Intermediate species
________, such as N2O2, are so- called because they occur in the reaction mechanism but not in the overall balanced equation.
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B
The relationships between the concentrations of reactants A and ________ and the reaction rate are specified by the exponents x and y.
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Enzymes
________ are ________ that act as biological catalysts.
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Enzyme catalysis
________ is the most spectacular and important of all the complicated mechanisms that have evolved in living systems.
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Kinetic energy
energy available as a result of an object's motion
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Chemical kinetics
branch of chemistry that studies the rates at which chemical reactions take place
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Rate of a reaction
defined as the change in the concentration of a reactant or a product over time (M/s)
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Rate of a reaction
proportional to the concentration of reactants, and the rate constant is the proportionality constant k
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Half-life (t1)
assess the rate of a reaction by linking concentration to time
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Half-life (t1 2)
time it takes for a reactant's concentration to drop to half of its initial concentration
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Second-order reaction
rate of the reaction is determined by the concentration of one reactant raised to the second power or the concentrations of two separate reactants raised to the first power
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Activation energy (Ea)
smallest amount of energy needed to start a chemical reaction
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Bimolecular reaction
basic step in which two molecules interact
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Unimolecular reaction
simple reaction in which only one reacting molecule is involved
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