Question

Write observations:

Ammonia gas is passed over heated copper (II) oxide.

Answer 1

When gaseous ammonia is passed over solid copper (II) oxide at high temperatures, nitrogen gas is formed.

\[\ce{2NH3_{(g)} + 3CuO_{(s)} → N2_{(g)} + 3Cu_{(s)} + 3H2O_{(g)}}\]

Also, this N₂ gas is not pure, as it would be in the heating of NaN₃, like compounds.