energy stored in the reactants breaking bonds of the reactants kinetic energy absorbed by the reaction potential energy absorbed by the reaction
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A teacher demonstrates a chemical reaction. A student observes that the test tube in which the reaction occurs becomes warm. What is the source of the thermal energy generated by the reaction?
Possibilities:
- energy stored in the reactants
- breaking bonds of the reactants
- kinetic energy absorbed by the reaction
- potential energy absorbed by the reaction

energy stored in the reactants