Question

Help pls need it!:))

Answer 1

Answer:

$\textsf {A}$

Explanation:

$\textsf {The effect of a catalyst on the energy of a reaction system }\\\textbf {is that it reduces the activation energy.}$

Answer 2

Answer:

it reduces the activation energy (option A)

Explanation:

we know that a catalyst reduces the activation energy because it speeds up a reaction (that is what a catalyst is--a substance that speeds up a reaction [whilst leaving it unchanged chemically]. )

So, if a catalyst is speeding up the time it takes for a reaction to occur, it is logically lowering the minimum energy that is needed for the reaction to occur.

This can best be expressed in option A, because it lowers the activation energy