Kinetics Lectures
Kinetics Lectures
Kinetics Lectures
Kinetics lectures
Kinetics Lecture 1
will a reaction happen?- thermodynamics
how fast will it happen?-kinetics
how far will a reaction happen?-equilibrium
Four main factors that influence how quickly a reaction takes place:
1. collisions- for two molecules to react with each other they must collide
2. activation energy- the activation energy must be overcome
collide
Alex Harutunian
electrons go through an ugly and congested transition state and that is why
kinetic energy is needed
factors that affect rates:
1. Temperature
Alex Harutunian
How does it work?- it changes the energy pathway for a chemical reaction
and provides and alternate route that lowers the activation energy meaning
more particles have the required energy to undergo a successful collision.
what a catalyst does:
changes
NO 2+ F=NO 2 F
2 NO 2+ F 2=2 NO 2
(fast)
Alex Harutunian
slow step
Intermediate:
produced in one step, gets used up in another--isn't part of
the balanced equation
Catalyst:
Good Mechanisms:
1. The molecularity (coefficients) of the rate limiting step is consistent
with the experimentally determined rate law
2. The mechanism is consistent with the overall balanced equation
Kinetics lecture 2
Concentration vs. Time-- A ---> B
Alex Harutunian
y
x
[ ] = concentration