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Lecture 3

CHM135H1 Lecture Notes - Lecture 3: Canavalia Ensiformis, Activation Energy, Reagent


Department
Chemistry
Course Code
CHM135H1
Professor
Dvira Segal
Lecture
3

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Mechanisms are inferred from the experimental rate law:
2 NO + O2 2 NO2 E.g. net reaction:
Experimentally, = k [NO]2 [O2]
d[O2]
dt
2 NO + O2 2 NO2 E.g.
Plausible mechanisms:

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Rate depends upon:
1. Concentration of reactants
2. Temperature
3. Presence of catalyst
1. Concentration of reactants
2. Temperature 2. Temperature

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Dependence of rate upon temperature
Sensitive! 25oC → 35oC = 3 rate
Collision theory 3 conditions for reaction:
Reaction is
E.g. bimolecular reaction
collisions between reactants A and B... Reaction is
Transformation
Reactant
molecules
Product
molecules
rate of collision = (Z [A] [B])
that have both correct orientation...
p = sensitivity to orientation:
with correct orient'n p
collisions between reactants A and B... Reaction is
rate of collision = Z [A] [B]
E.g. bimolecular reaction
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