While silver oxide contains oxygen, it is already in an oxidized state. It doesn't readily react with more oxygen to produce further oxidation. Instead, silver oxide decomposes when heated:
2Ag₂O(s) → 4Ag(s) + O₂(g)
This reaction is not combustion, but rather a thermal decomposition. When heated, silver oxide breaks down into metallic silver and oxygen gas.
Here's why silver oxide doesn't combust:
* It's already oxidized: Silver oxide is a product of oxidation, not a fuel source.
* Decomposition, not oxidation: Heating silver oxide causes it to decompose into its elemental components, rather than reacting with oxygen.
In summary: While silver oxide is a compound containing oxygen, it does not undergo combustion. It decomposes when heated into silver and oxygen gas.