Question

Define activation energy and catalyst

Answer 1

Activation energy is the minimum amount of energy it takes to start a chemical reaction. ... A catalyst is a substance that changes the rate of a chemical reaction without being consumed in the reaction. A catalyst is never used up. It is regenerated by the chemical reaction so it can be used again and again.

Answer 2

Answer:

Activation Energy is defined as the minimum energy required to start a reaction.

The need of activation energy act as a barrier for the beginning of a reaction.

Catalyst is a substance that increases the rate of a chemical reaction

e.g enzyme are catalyst