Sorry this is the last question i have

Question

select from the words below the effect of a catalyst on each of the following. (Words can be used more than once or not at all).

Words: Increase, decrease, changes, doesn't change

activation energy
reaction mechanism
enthalpy of reaction
rate of forward step
rate of reverse step

Please help :) i'd like to know this for my upcoming exam

Answer 1

a. decreases activation energy.
b. reaction mechanism changes (because intermediates are formed).
c. enthalpy doesn't change.
d.increases rate of fwd rxn.
e. increases rate of reverse rxn.