Question 1
Which of the following reactions would be the most spontaneous at 298 K?
◦ A + B → C;
E°
cell = +1.22 V
◦ A + B → 2 C;
E°
cell = -0.030 V
◦ A + B → 3 C;
E°
cell = +0.15 V
◦ A + 2 B → C;
E°
cell = +0.98 V
◦ A + B → C;
E°
cell = -1.22 V
Question 2
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25 °C. (The equation is balanced.)
3Cl
2(
g) + 2Fe(
s) → 6Cl⁻(
aq) + 2Fe
3+(
aq)
Cl2(g) + 2 e⁻ → 2Cl⁻(aq) | E° = +1.36 V |
Fe3+(aq) + 3 e⁻ → Fe(s) | E° = -0.04 V |
◦ +4.16 V
◦ +1.32 V
◦ -1.40 V
◦ +1.40 V
◦ -1.32 V