Interpret Chemical Energy Diagrams
Chemistry · Flashcards · Application
CHEMISTRY · FLASHCARDS
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QUESTION
Find
Δ
H
\Delta H
Δ
H
if
E
a
,
f
o
r
w
a
r
d
=
65
kJ
E_{a,forward}=65\,\text{kJ}
E
a
,
f
or
w
a
r
d
=
65
kJ
and
E
a
,
r
e
v
e
r
s
e
=
95
kJ
E_{a,reverse}=95\,\text{kJ}
E
a
,
r
e
v
er
se
=
95
kJ
.
QUESTION
Identify
Δ
H
\Delta H
Δ
H
if the diagram shows reactants at
10
kJ
10\,\text{kJ}
10
kJ
and products at
−
15
kJ
-15\,\text{kJ}
−
15
kJ
.
QUESTION
Identify the sign of
Δ
H
\Delta H
Δ
H
if
E
a
,
r
e
v
e
r
s
e
=
120
kJ
E_{a,reverse}=120\,\text{kJ}
E
a
,
r
e
v
er
se
=
120
kJ
and
E
a
,
f
o
r
w
a
r
d
=
80
kJ
E_{a,forward}=80\,\text{kJ}
E
a
,
f
or
w
a
r
d
=
80
kJ
.
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ANSWER
Δ
H
<
0
\Delta H < 0
Δ
H
<
0
. Reverse barrier is larger, so products are lower than reactants.
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