Question

which is the best description of activation energy? a) heat released as the reaction proceeds b) heat added to initiate a reaction c) heat stored within the product molecules d) heat stored within the reactant molecules

Explanation:

Activation energy is the minimum amount of energy that reactant molecules must possess to undergo a chemical reaction, often provided as heat to initiate the reaction. Options A refers to reaction - heat release, C and D refer to stored energy in products and reactants respectively, which are not activation energy.

Answer:

B) heat added to initiate a reaction