When matter changes, what the most common form of energy released or absorbed ?

Question

im not sure but is it thermal energy or chemical energy

Answer 1

In a chemical reaction, heat is generally either absorbed or released, so the answer is thermal.

If the reaction is nuclear, energy may be thermal, electromagnetic (γ,β,π) or momentum (α,β). using β to indicate an electron as particle or wave and π for a photon.

  

Answer 2

it is usually thermal energy