Kernels of corn or heat it and become popcorn why is this a chemical change the size and color of the corn have changed the kernels change due to the reaction to heat the volume of the kernels expand the mass of the kernels increase

kernels change due to the reaction to heat

Explanation:

It is a chemical change because the kernels complete give a new product due to the reaction with heat.

A chemical change is a change in which a new product is obtained. Here the new product is the pop-corn derived from the kernel.

A chemical change is not reversible. We cannot simply change the pop-corm back to the kernel. It is usually accompanied by heat changes. A new product is always formed.