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Physical
Kinetics
The Maxwell Boltzmann Distribution
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Cards (7)
Label the Maxwell Boltzmann distribution curve.
Label the missing gaps with the correct annotations:
A)
Most probable energy
B)
Average energy
C)
Activation energy
D)
Number of molecules
E)
Energy
5
State and explain the key features of the Maxwell Boltzmann distribution curve.
Curve originates at the
origin
-> indicates that
no
molecules have
zero
kinetic
energy
Rises sharply to a peak -> represents the most
common
kinetic
energy
level among the molecules
The
total
area
under the
curve
is equivalent to the
total number
of
molecules
The
peak
of the curve shows the
most probable
kinetic
energy
a molecule can have
Explain how increasing temperature increases the rate of a reaction.
As temperature
increases
, particles have more
kinetic energy
Particles also more likely to have the
activation energy
Leads to
higher
frequency
of
successful
collisions
What is the Maxwell Boltzmann distribution?
The
distribution
of
molecular energies
in
gases
Describe the effect of increasing temperature on the Maxwell Boltzmann distribution curve.
When temp is increased, the
peak
of the distribution curve is
lower
and shifted to the
right
the total area under the curve
remains
the
same
A)
Higher temp
B)
Lower temp
2
Which part of the curve is equal to the total number of gas molecules?
The
area
under
the
curve
Explain why a small increase in temp results in a large increase in the rate of reaction.
small increase in temp shifts distribution curve to the
right
This indicates that both the
rate of collisions
and the
proportion of collisions
that lead to
successful
reactions
increase with temp