C8.2 Collision Theory And Surface Area

Question 1

What does collision theory explain?

Answer 1

How various factors affect rates of reactions

Collision theory is fundamental in understanding chemical kinetics.

Question 2

What is required for chemical reactions to occur according to collision theory?

Answer 2

Reacting particles must collide with each other and with sufficient energy

This emphasizes the importance of both collision frequency and energy in reaction rates.

Question 3

What is the minimum amount of energy that particles must have to react called?

Answer 3

Activation energy

Activation energy is a key concept in determining the rate of a chemical reaction.

Question 4

How does increasing the number of collisions affect the rate of reaction?

Answer 4

Increases the rate of reaction

More collisions lead to a higher likelihood of successful reactions.

Question 5

What happens to the rate of reaction when the energy of collisions decreases?

Answer 5

Decreases the rate of reaction

Lower energy collisions are less likely to overcome the activation energy barrier.

Question 6

Fill in the blank: Chemical reactions can occur only when reacting particles collide with each other and with _______.

Answer 6

sufficient energy

This is a core principle of collision theory.

Question 7

How does surface area affect the rate of reaction

Answer 7

Large pieces of the reactant are cut into smaller pieces
This increases the surface area of the reactants
The larger surface area increase frequency of collisions
More frequent collisions means that the rate of reaction increased