2 C3H8 + 11 O2 → 16 HO + 6 CO
This is an oxidation-reduction (redox) reaction:
6 C-8/3 - 28 e- → 6 CII (oxidation)
16 O0 + 16 e- → 16 O-I (reduction)
6 O0 + 12 e- → 6 O-II (reduction)
C3H8 is a reducing agent, O2 is an oxidizing agent, O2 is an oxidizing agent.