The reaction:

Calcium carbide (CaC₂) reacts with water (H₂O) to produce acetylene gas (C₂H₂) and calcium hydroxide (Ca(OH)₂).

The balanced chemical equation:

CaC₂(s) + 2H₂O(l) → C₂H₂(g) + Ca(OH)₂(aq)

Explanation:

* Calcium carbide is a solid compound that contains carbon and calcium.

* Water is a liquid.

* Acetylene is a flammable gas.

* Calcium hydroxide is a solid that dissolves in water.

This reaction is an example of a hydrolysis reaction, where water is used to break down a compound.

Let me know if you'd like to know more about this reaction or acetylene gas!