5 CH3CH2OH (aq) + 12 KNO3 (aq) → 10 CO2 (g) + 9 H2O (l) + 6 N2 (g) + 12 KOH (aq)
This is an oxidation-reduction (redox) reaction:
10 C-II - 60 e- → 10 CIV (oxidation)
12 NV + 60 e- → 12 N0 (reduction)
This is a gas evolution reaction, CO2 and N2 is the formed gas.