Rates and Equilibrium

Question 1

What are the 3 things that have to happen in order for molecules to successfully collide?

Answer 1

• They collide
• They collide with sufficient energy (to break bonds b/w reactants)
• They collide with the correct orientation (to break bonds b/w reactants)

Question 2

What is Maxwell-Boltzmann distribution?

Answer 2

It shows the distribution of kinetic energies of particles on a graph

Question 3

What is rate of reaction?

Answer 3

The change in concentration of a reactant or product per unit time

Question 4

What are the 5 things that can change the rate of reaction?

Answer 4

• Surface area (of solid reactants)
• Concentration (of a solution)
• Pressure of gases (or volume)
• Temperature
• Catalyst usage

Question 5

What are the key terms to use when talking about surface area/concentration/pressure affecting the rate of reaction?

Answer 5

Increases/Decreases the frequency of successful collisions PER UNIT TIME

Question 6

What are the key terms to use when talking about temperature affecting the rate of reaction?

Answer 6

• Increase/Decrease in kinetic energy
• Increases/Decreases the PROPORTION of particles with sufficient energy to react
• Increases/Decreases the frequency of successful collisions PER UNIT TIME

Question 7

What are the key terms to use when talking about catalysts affecting the rate of reaction?

Answer 7

• They lower the activation energy
• They increase the PROPORTION of particles with sufficient energy to react
• This increases the frequency of successful collisions PER UNIT TIME

*note: catalysts do NOT affect yield, only affects rate of reaction