4 NH3 (g) + 7 O2 (g) → 4 NO2 (l) + 6 H2O (l)
This is an oxidation-reduction (redox) reaction:
4 N-III - 28 e- → 4 NIV (oxidation)
14 O0 + 28 e- → 14 O-II (reduction)
NH3 is a reducing agent, O2 is an oxidizing agent.
Reactants:
- NH3
- Names: Ammonia , Azane (only intended for use in naming derivatives of ammonia) , Hydrogen nitride
- Appearance: Colourless gas ; Colourless gas or compressed liquefied gas with pungent odour ; Colorless gas with a pungent, suffocating odor. [Note: Shipped as a liquefied compressed gas. Easily liquefied under pressure.]
- O2
Products:
- NO2 – Nitrogen dioxide
- Other names: Nitrogen(IV) oxide , Deutoxide of nitrogen , Nitrogen peroxide
- Appearance: Brown gas ; Reddish-brown gas or brown or yellow liquid with pungent odour ; Yellowish-brown liquid or reddish-brown gas (above 70°F) with a pungent, acrid odor. [Note: In solid form (below 15°F) it is found structurally as N2O4.]
- H2O – Water, oxidane