Kinetics

Question 1

What is rate of reaction? (2)

Answer 1

• The change of amount of
  reactant of product per time (1)

Rate = Amount of reactant / Time

Question 2

What is activation energy? (1)

Answer 2

• The minimum energy required
  for a reaction to occur (1)

Question 3

What is the maxwell Boltzmann distribution? (3)

Answer 3

• Shows the energy of gas
  particles (1)
• Kinetic energy on the x-axis (1)
• Number of molecules on the y-
  axis (1)

Question 4

What does the area under the curve show? (1)

Answer 4

• Total number of molecules (1)

Question 5

What does the peak on the maxwell-Boltzmann curve indicate? (1)

Answer 5

• The most likely energy of a particle in a sample (1)

Question 6

What happens to the curve when temperature increases? (2)

Answer 6

• Curve shifts to the right and
  has a lower peak (1)
• Area under the curve stays the
  same but is increased beyond
  activation energy (1)

Question 7

How does temperature increase rate of reaction in terms of collision? (2)

Answer 7

• Particles have higher kinetic
  energy (1)
• More collisions results in more
  particles having greater energy
  than activation energy (1)

Question 8

How does increased pressure and concentration increase rate of reaction? (2)

Answer 8

• Particles are closer together (1)
• More frequent collisions (1)

Question 9

How do catalysts increase rate of reaction? (2)

Answer 9

• Lowers the activation energy
  (1)
• By providing an alternate
  reaction pathway (1)

Question 10

Why are catalysts used in the industry (2)

Answer 10

• Reduces the temperature required for a reaction (1)
• Saves energy and money (1)

Question 11

What happens on the surface of heterogenous catalysts in a reaction? (3)

Answer 11

• Reactants adsorb on catalyst
  surface (1)
• Reaction takes place (1)
• Product desorbs from catalyst
  (1)

Question 12

What happens to the activation line on the distribution curve when a catalyst is added? (1)

Answer 12

• Line shifts to the left (1)