1/25 Flashcards
1
Q
Work done by an electrochemical cell = -W = ΔG (cal/mol) =
A
-nFE
> n: valence state
> E: potential difference (V) or (J/C)
> F = 96,500
2
Q
Cell potential (Nernst equation) E =
A
-ΔG/nF
3
Q
More negative E =
A
anode
4
Q
More negative ΔG =
A
cathode
5
Q
For dilute soln: activity =
A
concentration
6
Q
If overall E for the cell is negative, then ΔG is positive, and
A
the reaction likely won’t happen
7
Q
SCE electrode:
A
E = + 241 mV
8
Q
Silver-silver chloride electrode:
A
E = + 288 mV
9
Q
If E(+), corrosion ____ _____
A
will occur because ΔG is (-)
10
Q
Potential is a measure of the
A
oxidizing power of the soln
11
Q
Non-standard conditions:
A
activity is not 1
12
Q
G =
A
Go + RTlna
13
Q
ΔG =
A
Gproducts - Greactants
