We’re being asked to calculate the ΔG° for cell reaction below:
I- (aq) | I2 || Fe+2 (aq) | Fe
We will have to calculate for the ΔG° using the following steps:
Step 1: Identify the anode and the cathode in the reaction and write the overall reaction
Step 2: Calculate the cell potential of the reaction.
Step 3. Calculate ΔG°.
ΔG° = Gibbs Free Energy, J
n = # of e- transferred
F = Faraday’s constant = 96485 J/(mol e-)
E°cell = standard cell potential, V
Using the table of half-cell reactions, calculate the ΔG° for cell reaction below. (Make sure you find n for the reaction.)
I- (aq) | I2 | | Fe+2 (aq) | Fe
1) -200 kJ
2) +200 kJ
3) -100 kJ
4) +100 kJ
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Cell Potential concept. If you need more Cell Potential practice, you can also practice Cell Potential practice problems.