Chemical energy wasn't "invented" in the same way that a device or technology is. It's a fundamental property of matter, existing in the bonds between atoms and molecules.

Here's why it's not a matter of invention:

* It's a natural phenomenon: Chemical energy is stored in the arrangement of atoms and molecules within a substance. It's not something humans created.

* It's been utilized for millennia: Humans have been using chemical energy since the beginning of civilization, from burning wood for fire to utilizing chemical reactions in cooking and other processes.

What we have invented are ways to harness and control chemical energy:

* Fire: This is perhaps the earliest and most basic form of using chemical energy.

* Batteries: These devices store and release chemical energy in a controlled way.

* Fuel cells: These convert chemical energy directly into electricity.

So, while the concept of chemical energy isn't a matter of invention, we've developed many ways to use it to our advantage over time.