Question

question 3 of 25
what information does the potential energy diagram reveal about a reaction?
a. it shows the changes in kinetic energy of the molecules.
b. it shows whether the reaction is exothermic or endothermic.
c. it shows what the enthalpy of formation is for each molecule.
d. it shows what phase changes occurred during the reaction.

Explanation:

A potential - energy diagram shows the potential energy changes during a reaction. If the products have lower potential energy than the reactants, the reaction is exothermic. If the products have higher potential energy than the reactants, the reaction is endothermic. It does not directly show kinetic energy changes, enthalpy of formation for each molecule, or phase - changes.

Answer:

B. It shows whether the reaction is exothermic or endothermic.