Kinetics

Question 1

Define a catalyst

Answer 1

• A catalyst gives an alternative route for a reaction to occur
• which lowers activation energy required therefore the rate of reaction increases

Question 2

Define activation energy

Answer 2

-The minimum amount of energy required for a reaction to occur

Question 3

What is collision theory?

Answer 3

• For a reaction to occur, particles must collide with enough force to break bonds and
• the energy has to be higher than the activation energy

Question 4

Name 5 factors that affect the rate of reaction

Answer 4

Pressure, temperature, concentration, surface area and catalysts

Question 5

How does temperature affect the rate of reaction?

Answer 5

• Provides more kinetic energy to particles and

- increases the likelihood of successful collisions

Question 6

How does pressure affect rate of reaction?

Answer 6

• Increasing pressure means
• there’s a smaller area for the particles to be in
• increase the likelihood of successful collisions in gas

Question 7

How does concentration affect rate of reaction?

Answer 7

• Increasing concentration means
• there’s a smaller area for the particles to be in
• increase the likelihood of successful collisions in solution

Question 8

Describe how the Maxwell Boltzmann distribution curve should look like

Answer 8

• must start at 0
• y axis= fraction of particles, x axis=energy
• the curve never meets the x axis
• the most probable energy is at the peak
• Know activation energy is close to the end of the curve

Question 9

How does temperature affect the Maxwell Boltzmann curve?

Answer 9

• It shifts the curve right
• Lowers the peak
• Total area beneath curve is the same
• Bigger proportion of molecules have activation energy

Question 10

How does lower concentration affect the curve?

Answer 10

• shifts left
• Higher peak
• less particles affected by activation energy
• total area beneath curve is the same