Chemists create potential energy diagrams to illustrate the potential energy of reactants and products and the change in enthalpy that occurs during a reaction. From potential energy diagrams, scientists can determine if a chemical reaction is endothermic or exothermic. For this assignment, you will be creating your own potential energy diagrams for three chemical reactions. Then you will use your diagrams to find the value of △H for each reaction. Complete the Endothermic and Exothermic worksheet and submit it to your instructor for grading. Before you begin, review the grading rubric and the example below. Example Decomposition of Hydrogen Peroxide Reaction Reactants Products Transition State 2H2O2(aq) → 2H2O(l) + O2(g) 2H2O2 −380 kJ* 2H2O + O2 −570 kJ* −230 kJ *Approximate enthalpy values plotted on the potential energy diagram. Potential energy in kilojoules. Review text version.