Evaporation doesn't involve a chemical reaction, so there isn't a chemical equation to balance. It's a physical change, where a substance changes state from liquid to gas.

Here's why:

* No new substances are formed: Water (H₂O) remains water, whether it's liquid or vapor.

* Only a change in state occurs: The molecules of water are simply moving more freely and farther apart in the gaseous state.

Here's a simplified explanation:

Water (liquid) ↔ Water (gas)

This is a reversible process, meaning that water vapor can also condense back into liquid water.

Let me know if you have any more questions about evaporation or other chemical processes!