Topic 6

Question 1

How does temp affect the rate of reaction?

Answer 1

• higher temp
• particles have more kinetic energy
• meaning particles collide more frequently and react faster

Question 2

How can you increase the rate of reaction when one reactant is a solid?

Answer 2

Break up the solid into small parts
This increases the surface area of the solid
Meaning there can be a greater frequency of collisions
Therefore the reaction is faster

Question 3

How does pressure of gases affect the rate of reaction

Answer 3

• higher pressure means particles are closer together
• this increases the frequency of collisions
• therefore increases the rate of reaction

Question 4

What is the effect of a catalyst on a reaction

Answer 4

Increases the rate of reaction

Question 5

How does concentration affect the rate of reaction

Answer 5

• higher the concentration
• leads to higher frequency of collisions
  Therefore faster reaction

Question 6

What is collision theory

Answer 6

The idea that reactions occur when particles collide with sufficient energy

Question 7

What is the definition of activation energy

Answer 7

The minimum amount of energy that particles must collide with to react

Question 8

How does a catalyst increase the rate of reaction?

Answer 8

It provides a different reaction pathway with a lower activation energy

Question 9

What is a reversible reaction

Answer 9

The reactants react to produce the products
The products react to produce the reactants

Question 10

If the forward reaction is exothermic, the backward reaction will be…

Answer 10

Endothermic

Question 11

What is the definition of equilibrium

Answer 11

When the rate of the forward reaction is equal to the rate of the backward reaction