Equilibria

Question 1

What is dynamic equilibrium?

Answer 1

When the rate of the forward reaction is the same as the backward reaction, there is no change in te amount of reactants or products

Question 2

What is Le Chatelier’s Principle?

Answer 2

Whatever you do to the equilibrium, it will do the opposite

Question 3

What can change the position of equilibrium?

Answer 3

Temperature and pressure changes

Question 4

A system tries to get hot?

Answer 4

Reducing temperature favours the exothermic reaction

Question 5

A system tries to cool down?

Answer 5

Increasing temperature favours the endothermic

Question 6

Forward reaction =?

Answer 6

Exothermic

Question 7

Backward reaction =?

Answer 7

Endothermic

Question 8

More moles =?

Less moles =?

Answer 8

Higher pressure

Lower pressure

Question 9

If pressure increases?

Answer 9

The low pressure side is favoured therefore the equilibria moves right to left

Question 10

> pressure =?

< pressure =?

Answer 10

= equilibria <

= equilibria >

Question 11

Eg:
2SO2 + O2 <> 2SO3
|\_\_\_\_\_\_\_\_|     |\_\_\_\_\_|
   3 moles       2 moles
     High              Low
  Pressure      Pressure

Answer 11

Pressure goes down, the high pressure side is favoured, therefore the equilibrium moves left to right (high to low)