9. Kinetics I

Question 1

Give the conditions for a chemical reaction to occur by collision theory

Answer 1

-Particles collide
- collide in the right direction/orientation
- collide with the minimum activation energy

Question 2

Define activation energy

Answer 2

The minimum energy which particles need to collide and start a reaction

Question 3

Describe the maxwell Boltzmann distribution graph

Answer 3

starts at 0 as no particles have no energy
Y axis - number of particles with this energy
X axis - Energy

Question 4

How does increasing temperature increase rate of reaction

Answer 4

increases rate
- increasing temperature means reactant particles will have a greater kinetic energy and will move faster with a greater proportion of particles having the minimum activation energy

Question 5

Describe how the maxwell boltzmann distribution graph would change with increased temperature

Answer 5

Peak sits to the right
Peak is lower
Area under the curve remains the same
Area under curve beyond activation energy increases

(opposite is true for lower temperature)

Question 6

Describe how increasing concentration impacts rate

Answer 6

more particles in a given volume so collisions are more frequent and higher chance for a collision with the minimum activation energy

Question 7

Explain how a catalyst works

Answer 7

A catalyst provides an alternative pathway with a lower activation energy