Here's why:
* Chemical Change: Involves the formation of new substances with different properties. In this case, the chemical reaction within the battery produces hydrogen gas (H2) and oxygen gas (O2), which are highly flammable and can form an explosive mixture when combined.
* Physical Change: Only alters the form or appearance of a substance, not its chemical composition.
The chemical reaction happening in a car battery is the electrolysis of water. This process uses electrical energy to split water molecules (H2O) into hydrogen (H2) and oxygen (O2) gases. This reaction is driven by the battery's internal chemical processes.
