
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Transcribed Image Text:Suppose a pair of chemical compounds A and B can react in two different ways:
Reaction 1 gives product C.
Reaction 2 gives product D.
A+B → C
A+B → D
The following facts are known about the two reactions:
• Reaction 1 is endothermic and Reaction 2 is exothermic.
• If a reaction vessel is charged ("filled") with A and B, then at first D is produced faster than C.
Use these facts to sketch a qualitative reaction energy diagram for both reactions.
Note: because these sketches are only qualitative, the energies don't have to be exact. They only have to have the right relationship to each other. For example,
if one energy is less than another, that fact should be clear in your sketch.
energy
A + B
Reaction 1
reaction coordinate
с
energy
A + B
Reaction 2
reaction coordinate
X
D

Transcribed Image Text:Suppose the formation of nitryl fluoride proceeds by the following mechanism:
elementary reaction
NO₂(g) + F₂(9) NO₂F(g) + F(g)
F(g) + NO₂(g) →→ NO₂F(g)
Suppose also k₁ <<k₂ . That is, the first step is much slower than the second.
step
1
2
Write the balanced
chemical equation for the
overall chemical reaction:
Write the experimentally-
observable rate law for the
overall chemical reaction.
Note: your answer should
not contain the
concentrations of any
intermediates.
Express the rate constant
k for the overall chemical
reaction in terms of k₁, K2,
and (if necessary) the rate
constants k-1 and k-2 for
the reverse of the two
elementary reactions in
the mechanism.
rate = k
k =
rate constant
k₁
k₂
00
X
Ś
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