Calculate enthalpy of reaction using bond energies. Use the References to access important values if needed for this question. Use average bond enthalpies (linked above) to calculate the enthalpy change for the following gas-phase reaction. I2(g) +Cl2(g) 2ICI(g) To analyze the reaction, first draw Lewis structures for all reactant and product molecules. Include all valence lone pairs in your answer. Draw the reaction using separate sketchers for each species. One molecule per sketcher, please. Separate multiple reactants and/or products using the + sign from the drop-down arrow. Separate reactants from products using the symbol from the drop-down menu. If you have to draw H2, draw H-H.