Kinetics

Question 1

What is activation energy?

Answer 1

The minimum amount of energy needed for a reaction to occur

Question 2

What must happen for a reaction to occur? (2)

Answer 2

• Particles must collide
• With E≥Ea

Question 3

The rate of reaction is only influenced by what? (5)

Answer 3

• Temperature
• Concentration
• Pressure
• Catalysts
• Surface Area

Question 4

Why does __________ increase rate of reaction?

• Temperature
• Concentration

Answer 4

• More particles have E≥Ea which increases frequency of successful collisions
• Increase in number of particles per unit volume which increases frequency of successful collisions

Question 5

Why does __________ increase rate of reaction?

• Pressure
• Catalyst

Answer 5

• Increase in number of particles per unit volume which increases frequency of successful collisions
• Lowers Ea so more particles have E≥Ea which increases frequency of successful collisions

Question 6

Why does surface area increase rate of reaction?

Answer 6

Increased number of reactant particles made available which increases frequency of successful collisions

Question 7

Label the Maxwell-Boltzmann distribution curve

Answer 7

Question 8

Draw Maxwell-Boltzmann distribution curve with increase in temperature

Answer 8

Question 9

If the concentration of particles increased, how would the graph change?

Answer 9

Question 10

How does a catalyst work?

Answer 10

Provides an alternative reaction pathway which lowers activation energy