* No new substances are formed: The coffee and milk remain the same chemical compounds. They simply mix together.
* Change in physical properties: The mixture changes color, taste, and texture, but these are physical changes. For example, the milk particles disperse in the coffee, but their chemical composition doesn't change.
In contrast, a chemical reaction would involve:
* Formation of new substances: The atoms in the reactants would rearrange to form different molecules with different properties.
* Energy change: Chemical reactions usually involve the release or absorption of energy (heat, light, etc.).
So, while adding milk to coffee is a change, it's not a chemical reaction. It's a physical change that alters the appearance and properties of the mixture.
