Worksheet 18.2: Reaction Energy and Rates, featuring a potential energy diagram and questions on exothermic/endothermic reactions, reaction rates, and activation energy.

A worksheet titled "Worksheet 18.2" featuring a potential energy diagram with labeled points A, B, C, and D, illustrating an exothermic reaction. The diagram shows the energy change from reactants to products, with a peak representing activation energy. Below the diagram, there are questions related to reaction types (exothermic and endothermic), reaction rates, and collision theory, including true/false statements and explanations about activation energy and reaction rates.