The conversation between human and AI assistant.
[|Human|] Identify the chemical reaction type for the following equation.
[|AI|] The chemical reaction type for the given equation Al + O2 → Al2O3 is a synthesis reaction or a direct combination reaction. In this reaction, two or more substances, Aluminum and Oxygen, react to form a single product, Aluminum oxide.
[|Human|] 
Identify the chemical reaction type for the following equation.