During this chemical reaction energy is absorbed. In the chemistry lab, this would be indicated by a decrease in temperature or if the reaction took place in a test tube, the test tube would feel colder to the touch. Reactions like this one A. are exothermic because the reactants have more energy than the products

B. are endothermic because the reactants have less energy than the products

C. get cold because they require activation energy

D. get cold because the mass of the products is greater than the mass of the reactants