Reaction Kinetics

Question 1

Define heterogeneous catalyst.

Answer 1

Heterogeneous catalyst is of different physical states compared to reactants.
The catalyst speeds up the rate of reaction through a different reaction pathway with a lower activation energy and is chemically unchanged at the end of the reaction.

Question 2

Describe enzymes.

Answer 2

Enzymes are proteins that catalyse chemical reactions in living systems and have specific activity.

Question 3

Define activation energy.

Answer 3

The activation energy of a reaction is the minimum amount of energy that the reactant particles must possess before they can collide to result in a reaction.