Question

why does a chemical change always involve an absorption or liberation of energy?​

Answer 1

Answer:

because it contains transffer of energy from one state to another .

as the rule of conservation of energy, energy can not be destroyed or created so energy transforms its state by absorbing or liberating energy...

hope it helps

PLZZ MARK AS BRAINLIEST

Answer 2

Answer:

due to absorption of energy when chemical bonds are broken, and the release of energy when chemical bonds are formed, chemical reactions almost always involve a change in energy between products and reactants.

This stored chemical energy, or heat content, of the system is known as its enthalpy