C8 - Rates and Equilibrium

Question 1

list 3:

factors to measure to find the rate of reaction

Answer 1

• mass
• temperature
• light intensity

Question 2

describe:

how to measure light intensity to find the rate of reaction

RP

Answer 2

1. cross (‘x’) on paper below solution.
2. time taken for cross to disappear after reaction has started

Question 3

formula:

rate of reaction

2 formulas

Answer 3

reactant used / time
OR
product formed / time

Question 4

define:

collision theory

Answer 4

colliding particles will start a reaction if they have sufficient energy

Question 5

define:

activation energy

Answer 5

minimum amount of energy for a collision to be successful

successful - to start a reaction

Question 6

name:

2 factors that affect the rate of reaction

in terms of collision theory

Answer 6

1. frequency of particle collisions
2. kinetic energy of particles

Question 7

list:

5 factors that affect rate of reaction

Answer 7

• SA : V
• temperature
• concentration
• pressure
• catalysts

Question 8

define:

dynamic equilibrium

Answer 8

rate of forward reaction = rate of backwards reaction

in a reversible reaction

Question 9

symbol:

reversible reaction

Answer 9

⇌

Question 10

What can be said about the forwards and backwards reaction in a reversible reaction?

Answer 10

one is exothermic and one is endothermic

Question 11

define:

Le Chatelier’s Principle

Answer 11

changing conditions to change the position of the equilibrium

Question 12

How does pressure increase change the position of the equilibrium?

Answer 12

position shifts towards the side of fewer molecules of gas

Question 13

How does temperature increase change the position of the equilibrium?

Answer 13

position shifts towards the direction of the endothermic reaction

Question 14

How does concentration of reactant increase change the position of the equilibrium?

Answer 14

position shifts towards the products