2.4 Equilibrium

Question 1

what sign is used to show a reversible reaction

Answer 1

⇌

Question 2

When is a reaction at equilibrium?

Answer 2

when a reaction is in equilibrium, the concentrations of reactants and products remains constant

Question 3

how can the position of equilibrium be changed? x3

Answer 3

• changing concentration of product and/or reactants
• changing the temperature
• changing the pressure in a reaction involving gases

Question 4

state le Chatelier’s principle

Answer 4

if a change is made to the conditions of a system at equilibrium, then the position of equilibrium will move to oppose the change

Question 5

what is dynamic equilibrium?

Answer 5

dynamic equilibrium is when:
- the rate of the forward reaction is equal to the rate of
the reverse reaction
- the concentrations of both products and reactants are
equal

Question 6

what does the Haber process produce?

Answer 6

Ammonia

Question 7

what is the equation for the Haber process?

Answer 7

N2 + 3H2⇌ 2NH3

Question 8

what temperature is the haber process done at and why?

Answer 8

450 degrees c

high enough to produce a good yield of ammonia whilst not costing too much money

Question 9

what pressure us the haber process carried out at and why?

Answer 9

200 atmospheres

high enough to produce a good yield but not too high that it would cost a large amount of money

Question 10

what catalyst is used in the haber process?

Answer 10

iron