8. The activation energy for the forward, uncatalyzed reaction is

II minus I

IV minus III

III minus I

IV minus II

9. The reaction represented by the potential energy diagram above is and the energy term would be included as a chemical equation. in the balanced

The statement above is best completed by the answers in row:

Row

i

ii

exothermic

reactant

endothermic

product

endothermic

reactant

exothermic

product

10. Which of the following statements describes how the reaction changes with the addition of a catalyst?

The enthalpy change of the reaction is lower.

More energy is released to form the bonds in the products.

More energy is required to break the bonds in the reactants.

The rate of reaction increases.