Save
kinetics
Save
Share
Learn
Content
Leaderboard
Learn
Created by
S C
Visit profile
Cards (27)
kinetics studies the
rate
of
reactions
the rate of disappearance is
negative
average reaction rate
=△C/△t
rate
of
appearance
is
positive
concentration
of a
reactant
or
product
can be plotted as a function of
time
a
secant line
is a line that
intersects two points
on a
curve
. It provides the average rate of disappearance of the nucleus
the
instantaneous reaction rate
is the rate of reaction at a
particular point in time
fission:
splitting
an
atom
into
two smaller atoms
Fusion
:
combining two small nuclei into one big nucleus
Collision Theory
: The
particles collide
with each other and the
energy
is
transferred
to the
particles.
chemical system
consists of
particles
that are in
constant motion
an
effective collision
has
sufficient energy
and
correct orientation
ineffective collision
involves
particles
that
rebound
from the collision
the
rate
of a
reaction
depends on the
frequency
of
collisions
rate
=
frequency
of
collisions
x
fractions
that are
effective
activation energy
: the
minimum amount
of energy needed for a reaction to occur, usually in the form of a
catalyst
Factors that affect the rate of a reaction:
nature of reactants
,
concentration
,
surface area
,
temperature
,
catalyst
heterogeneous catalysts are in a
different phase
than the reactants
homogeneous catalysts
are in the
same phase
as the reactants
Simple Reactions
: consists of
one elementary step
which involves
1
,
2
or
3 particle collisions
Complex reactions
: consist of
more than one elementary steps
involving
many particles
the steps that make up a reaction is known as the
mechanism
an intermediate does not qualify as a
product
or
reactant
, but is
consumed
or
formed
rate determining step
: The slowest step of the reaction
molecularity
: used to indicate the
number
of
reactant molecules
bimolecular
:
two reactants
are involved
unimolecular
: only
one reactant
is involved