Cell Potential and Free Energy
AP Chemistry · Flashcards · Application
AP CHEMISTRY · FLASHCARDS
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QUESTION
Calculate
E
E
E
for
E
cell
0
=
1.10
V
E^0_\text{cell} = 1.10 \text{ V}
E
cell
0
=
1.10
V
,
T
=
298
K
T = 298 \text{ K}
T
=
298
K
,
n
=
2
n=2
n
=
2
,
Q
=
0.1
Q=0.1
Q
=
0.1
.
QUESTION
Calculate
△
G
\triangle G
△
G
for a cell with
n
=
2
n=2
n
=
2
,
F
=
96485
C/mol
F=96485 \text{ C/mol}
F
=
96485
C/mol
, and
E
=
1.5
V
E=1.5 \text{ V}
E
=
1.5
V
.
QUESTION
Determine the spontaneity:
E
cell
0
=
−
0.76
V
E^0_\text{cell} = -0.76 \text{ V}
E
cell
0
=
−
0.76
V
.
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ANSWER
Non-spontaneous reaction. Negative standard cell potential indicates
△
G
0
>
0
\triangle G^0 > 0
△
G
0
>
0
, non-spontaneous.
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