Rate And Extent Of Chemical Change

Question 1

What is collision theory

Answer 1

The more particles/energy the more collisions.
The more collisions the faster the reaction takes place
Particles have to collide with enough energy to overcome activation energy for the collision to be successful.

Question 2

What does rate of reaction depend on

Answer 2

Temperature
Concentration/pressure
Surface area
Presence of a catalyst

Question 3

What happens to the rate of reaction when temperature increased

Answer 3

Particles gain energy
Move faster
More frequent collisions
May have enough energy to overcome activation energy
More frequent successful collision
Increases rate of reaction

Question 4

What happens to the rate of reaction when concentration/pressure increases

Answer 4

More particles in given volume
Collisions are more frequent
More chance of successful collision
Increase rate of reaction

Question 5

What happens to the rate of reaction when we increase the surface area of one of the reactants

Answer 5

More frequent collisions
Increasing the rate of reaction

Question 6

What does a catalyst do

Answer 6

Decrease the activation energy by
providing an alternate reaction pathway

Question 7

What does it mean when a reversible reaction is at equalibrium

Answer 7

Both the forwards and backwards reactions are happening at the same rate

Question 8

What happens to a reversible reaction if you decrease the temperature

Answer 8

The position of equilibrium moves toward the side that is a product of an exothermic reaction

Question 9

What happens to a reversible reaction if you decrease the pressure

Answer 9

The position of equilibrium moves toward the side with the highest amount of molecules

Question 10

What happens to a reversible reaction if you decrease the concentration of the products

Answer 10

The position of equilibrium moves towards the products side to decrease the amount of reactant