7. What type of energy is contained in the matches within a matchbook?

A matchbook contains potential energy; just as a large stone at the top of a hill receives a little push, and the energy released as it travels downward, so a match when it is struck releases its stored, Potential energy as a flame. Potential Energy is the correct answer.

Explanation:

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.