(a)(i) What is meant by the activation energy of a reaction? (ii) State the effect of a catalyst on activation energy. (b) What substance serves as a cataly...
Question 1 Report
(a)(i) What is meant by the activation energy of a reaction?
(ii) State the effect of a catalyst on activation energy.
(b) What substance serves as a catalyst in each of the following?
(I) Hydrogenation of oils
(ii) Biochemical reactions.
Answer Details
(a)(i) The activation energy of a reaction is the minimum amount of energy that the reacting particles must possess before a collision between them can lead to a reaction (i.e. the minimum energy needed for an effective collision).
(ii) A catalyst lowers (reduces) the activation energy of the reaction by providing an alternative reaction pathway of lower activation energy, so more colliding particles have the required energy and the reaction proceeds faster.
(b) Catalyst in each case:
- (i) Hydrogenation of oils: nickel (finely divided nickel).
- (ii) Biochemical reactions: enzymes (biological catalysts).
Download The App On Google Playstore
Everything you need to excel in your exams
