H2O2 Dissociation - Heat, Free Energy and Equilibrium Constant
| Nonionic |
Δ Ho |
Δ Fo (kcal/mole) |
| H2O2 (g) = H2O (g) + O(g) |
+ 33.90 |
+ 25.60 |
| H2O2 (g) = 2H (g) + O2 (g) |
+ 136.72 |
+ 122.41 |
| H2O2 (g) = H2 (g) + 2O (g) |
+ 150.86 |
+ 135.23 |
| H2O2 (g) = 2H (g) + 2O (g) |
+ 255.04 |
+ 232.39 |
| H2O2 (g) = H (g) + O2H (g) |
+ 90. |
|
| O2H (g) = H (g) + O2 (g) |
+ 46. |
|
| Ionic |
Δ Ho |
Δ Fo (kcal/mole) |
| H2O2 (aq) = H+ + O2H- |
+ 8.2 |
+ 15.89 |
At 25 °C, K = [(H+) (O2H-)] / (H2O2) = 2.24 x 10-12 the free energy of formation for O2H- is –15.23 kcal/mole.