ts) For a reaction, the activation energy of the forward reaction is 102 kJ and the activation energy the reverse reaction is 120 kJ. of a. What is the AH of the reaction? b. Is the reaction endothermic or exothermic? c. If a catalyst is added to the reaction, what will happen to each of the following (increase, decrease, or stay the same)? I. Activation energy of the forward reaction Activation energy of the reverse reaction ΔΗ of the reaction II. III. IV. Rate of the reaction

Q1. According to the "collision theory" model, why does the rate of a reaction increase when temperature increases? I. There are more collisions per second. II. The molecules are vibrating with a higher frequency. III. A greater proportion of the collisions between reactants have the required activation energy for the reaction to proceed a. I only b. II only c. III only d. I,II and III e. I and III only Q2. A reaction was found to be first order with a rate constant of3.4×10−4 s−1What percentage of the starting material would remain after 2 hours? a.8.65%b.96.0%c.90.3%d.4.00%e.99.9%Q3. The half-life of a rection was calculated at 300 seconds. What \% of starting material would remain after 900 seconds? a.25%

a. Will the reaction happen? Explain your answer in detail with how the bonds will form. b. Explain in detail 2 ways that the molecules can be affected to speed up the rate of the reaction. 70 kJ Reactants N Activation Energy FF 50 kJ Products FN F 10 kJ Reaction Progress E'E N 10 kJ Potential Energy [kJ]

Catalysts increase reaction rates by _____ A) increasing the activation energy. B) increasing the enthalpy of reaction. C) decreasing the enthalpy of reaction. D) providing an alternate reaction mechanism with a lower activation energy. E) changing the value of the equilibrium constant.