Question

if this reaction was catalyzed, what would change in this diagram? nothing would change! this isnt an energy diagram. the particle curve would shift to the right, indicating more particles have energy at or above the ea. the ea would move to the right, indicating a decrease! the ea would move to the left, indicating a decrease!

Explanation:

Catalysts lower the activation energy ($E_a$) of a reaction. On an energy - reaction progress diagram, this is represented by a decrease in the height of the energy barrier. A lower activation energy means the $E_a$ value is reached more easily, so the $E_a$ mark on the diagram would move to the left.

Answer:

The $E_a$ would move to the left, indicating a decrease.