C3-8/3H8I + 3 O20 4 H20 + 3 CIVO2-II

This is an oxidation-reduction (redox) reaction:

3 C-8/3 - 20 e- 3 CIV (oxidation)

8 HI + 8 e- 8 H0 (reduction)

6 O0 + 12 e- 6 O-II (reduction)

C3H8 is a reducing agent, C3H8 is an oxidizing agent, O2 is an oxidizing agent.