, Chemical Finetics Chapter
14
chem 1120
·the
speed of a chemical reaction is called its reaction rate. -
how fast
reaction
the makes products or uses reactants
·generally, the
greater
concentration of molecules,
reactant faster
t he the
reaction
-increases frequency of molecule
reactant contact
-concentration of
gases depends on partial pressure of gast
the
I
Higher Pressure Higher Concentration
-
small molecules tend faster
react
to than
large molecules
->
gases faster
react than liquids, liquids reactfaster
than solids
·Rate-how much a
changes
quantity in a
given period of time
Rate
-z]
Rate
= over two time periods:
rar ASHe
H):
=
-
to -
t1
·
As time on, rate
the reaction because
goes of
generally slows down the
concentration of the reactants decreases
Average
·
of measured
rate
of
change-rate change
in concentrations in
any
period
- limar
the approximation of curve
particular time a
·Instantaneous rate
change
the concentration any particular time slope one
at
-
in at one
curve
point
on a
Reaction Rate and
Stoichiometry - Hacg) Fz(g) +
- 2
HIG)
-> for of
every one mol ofHe used one mole In will be used and
Rak=-IA).-=+=
2 mol ofHI is made +
e
Practice Problem:H20z(aq) BI
+
-
(aq) 2
+
H+ (aq) -[5(aq) 2Hz0(1) +
In first
the 10 seconds of
reaction,
the the concentration of I drops from
0 1.0M 0.808M
to
⑧ 3 is the coefficient
Rate
Average rate
in interval D [I] e
(1.0)
=
2. this time 1
-
3
b. Rate of concentration of It 10
change in the sec -
0.0 sec
Reminder:Duttisone
(that interval
its
It Math
is
during this
Remember: multiply the l
-
in the
113 across
since me divided by 3 (multiplied by I), our
numerator,
In
rate that we found be the then
whit, so for it, the
in a will
coeficient is 2, making
race
it2 times
per
r a te
the
across 30
that
is
the
the denominator.
per atom/molecule. Therefore
4.40x10-3
previous result:4.44 x10.3 by z you
the are in
Two
make
negatives
a positive
0.0044
we
for 2Ht. So the
role for 2H+=8.88x10-3 MIS
as we l l .
14
chem 1120
·the
speed of a chemical reaction is called its reaction rate. -
how fast
reaction
the makes products or uses reactants
·generally, the
greater
concentration of molecules,
reactant faster
t he the
reaction
-increases frequency of molecule
reactant contact
-concentration of
gases depends on partial pressure of gast
the
I
Higher Pressure Higher Concentration
-
small molecules tend faster
react
to than
large molecules
->
gases faster
react than liquids, liquids reactfaster
than solids
·Rate-how much a
changes
quantity in a
given period of time
Rate
-z]
Rate
= over two time periods:
rar ASHe
H):
=
-
to -
t1
·
As time on, rate
the reaction because
goes of
generally slows down the
concentration of the reactants decreases
Average
·
of measured
rate
of
change-rate change
in concentrations in
any
period
- limar
the approximation of curve
particular time a
·Instantaneous rate
change
the concentration any particular time slope one
at
-
in at one
curve
point
on a
Reaction Rate and
Stoichiometry - Hacg) Fz(g) +
- 2
HIG)
-> for of
every one mol ofHe used one mole In will be used and
Rak=-IA).-=+=
2 mol ofHI is made +
e
Practice Problem:H20z(aq) BI
+
-
(aq) 2
+
H+ (aq) -[5(aq) 2Hz0(1) +
In first
the 10 seconds of
reaction,
the the concentration of I drops from
0 1.0M 0.808M
to
⑧ 3 is the coefficient
Rate
Average rate
in interval D [I] e
(1.0)
=
2. this time 1
-
3
b. Rate of concentration of It 10
change in the sec -
0.0 sec
Reminder:Duttisone
(that interval
its
It Math
is
during this
Remember: multiply the l
-
in the
113 across
since me divided by 3 (multiplied by I), our
numerator,
In
rate that we found be the then
whit, so for it, the
in a will
coeficient is 2, making
race
it2 times
per
r a te
the
across 30
that
is
the
the denominator.
per atom/molecule. Therefore
4.40x10-3
previous result:4.44 x10.3 by z you
the are in
Two
make
negatives
a positive
0.0044
we
for 2Ht. So the
role for 2H+=8.88x10-3 MIS
as we l l .
