Chapter 12 - Chemical Kinetics

prefix uni

prefix uni

The ________- means one, bi- means two, and ter- means three.

Catalysts

________ can be classified as homogeneous or heterogeneous h** omogeneous**: They exist in the same phase as the reactants.

rate law

An integrated ________ relates concentration to reaction time.

Unimolecular step

________**: A reaction involving one molecule.

t1 2

For a first- order reaction, ________ is independent of the initial concentration.

theory of gases

The kinetic molecular ________ predicts that an increase in temperature raises molecular velocities and so increases the frequency of collisions between molecules.

proportionality constant k

The ________, called the rate constant, and n, called the order of the reactant, must both be determined by experiment.

identical molecules

When two ________ combine, the resulting molecule is called a dimer.

original concentration

The time required for a reactant to reach half its ________ is called the half- life of a reactant.

value of Ea

The ________ can be found by obtaining the values of k at several temperatures.

zero order reaction

A(n) ________ has a constant rate.

Heterogeneous catalysis

________ also occurs in the oxidation of gaseous sulfur dioxide to gaseous sulfur trioxide.

K

________ is the rate constant is the order; not related to the coefficients in the balanced equation.

Reaction mechanism

________, a series of elementary steps that must satisfy two requirements: The sum of the elementary steps must give the overall balanced equation for the reaction.

order reaction

For a first- ________, a plot of ln / [A]/versus t is always a straight line.

rate law

To experimentally determine the integrated ________ for a reaction, concentrations are measured at various values of t as the reaction proceed.