Values of measured bond energies may vary greatly depending on the molecule studied. Consider the following reactions: N C l 3 ( g ) → N C l 2 ( g ) + C l ( g ) Δ E = 375 k J / m o l O N C l ( g ) → N O ( g ) + C l ( g ) Δ E = 158 k J / m o l Rationalize the difference in the values of ∆ E for these reactions, even though each reaction appears to involve only the breaking of one N—Cl bond. (Hint: Consider the bond order of the NO bond in ONCl and in NO.)
Values of measured bond energies may vary greatly depending on the molecule studied. Consider the following reactions: N C l 3 ( g ) → N C l 2 ( g ) + C l ( g ) Δ E = 375 k J / m o l O N C l ( g ) → N O ( g ) + C l ( g ) Δ E = 158 k J / m o l Rationalize the difference in the values of ∆ E for these reactions, even though each reaction appears to involve only the breaking of one N—Cl bond. (Hint: Consider the bond order of the NO bond in ONCl and in NO.)
Solution Summary: The author explains the difference in the values of Delta E for the given reactions.
Values of measured bond energies may vary greatly depending on the molecule studied. Consider the following reactions:
N
C
l
3
(
g
)
→
N
C
l
2
(
g
)
+
C
l
(
g
)
Δ
E
=
375
k
J
/
m
o
l
O
N
C
l
(
g
)
→
N
O
(
g
)
+
C
l
(
g
)
Δ
E
=
158
k
J
/
m
o
l
Rationalize the difference in the values of ∆E for these reactions, even though each reaction appears to involve only the breaking of one N—Cl bond. (Hint: Consider the bond order of the NO bond in ONCl and in NO.)
Laser. Indicate the relationship between metastable state and stimulated emission.
The table includes macrostates characterized by 4 energy levels (&) that are
equally spaced but with different degrees of occupation.
a) Calculate the energy of all the macrostates (in joules). See if they all have
the same energy and number of particles.
b) Calculate the macrostate that is most likely to exist. For this macrostate,
show that the population of the levels is consistent with the Boltzmann
distribution.
macrostate 1 macrostate 2 macrostate 3
ε/k (K) Populations
Populations
Populations
300
5
3
4
200
7
9
8
100
15
17
16
0
33
31
32
DATO: k = 1,38×10-23 J K-1
Don't used Ai solution
Chapter 9 Solutions
Study Guide for Zumdahl/Zumdahl/DeCoste’s Chemistry, 10th Edition
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