The decomposition of HI into its elements is an exothermic reaction: Normally t...

The decomposition of HI into its elements is an exothermic reaction:

Normally this reaction has an activation energy of 180 kJ/mol. When the reaction is carried out in the presence of platinum metal, the activation energy is lowered to 80 kJ/mol. Draw an energy diagram for the uncatalyzed reaction. Label reactants, products, and a possible activated complex. Use a dotted line to show how the energy changes are different when platinum metal is added to the reaction.