Conversation so far:
What is chemical energy?
Chemical energy is the potential of a chemical substance to undergo a transformation through a chemical reaction to transform other chemical substances. Examples include batteries, food, gasoline, and etc.
Describe a chemical reaction.
No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
How is a chemical reaction represented mathematically?
A chemical reaction may be represented by a chemical equation, which indicates the number and type of each atom, as well as their organization into molecules or ions. A chemical equation uses the element symbols as shorthand notation for the elements, with arrows to indicate the direction of the reaction.
Give me an example of a chemical reaction.
Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.
What are the different kinds of chemical reactions?
The more common types of chemical reactions are as follows:Combination.Decomposition.Single displacement.Double displacement.Combustion.Redox.
What is a decomposition reaction?
A decomposition reaction is a type of chemical reaction in which one reactant yields two or more products.

Question: How is it a chemical change?
Self-contained rewrite: How is a decomposition reaction a chemical change?