Reaction rate =
Change in mass of reactants or products
/
Time
What is the basic process of the haber process
Synthesis of ammonia from nitrogen and hydrogen
Haber equation
N2 (g) + 3H2 (g) (reversible arrow) 2NH3 (g)
What is the haber equation in the forward reaction
Exothermic
The haber process requires high…
Activation energy (Ea)
And a catalyst (eg iron based)
The haber process has to occur at…
Equilibrium
And then use Le Chatelier’s Principle to maximise ammonia production
The temperature of around 450 degrees for the haber process is a…
Compromise
Maximise yield + reduce costs + increase rate
Effect on rate, yield and cost of a catalyst
Increased rate
No effect on yield
Decreased cost
Effect on rate, yield and cost of HIGH temperature
Increased rate
Decreased yield
Increased cost
Effect on rate, yield and cost of HIGH pressure
Increased rate
Increases yield
Increased costs
Where do we get the hydrogen from for the haber process
methane (CH4)
where do we get nitrogen from for the haber process
air
describe the conditions in the reactor for the haber process
200x atmospheric pressure
450 degrees
iron catalyst
what happens to unreacted nitrogen and hydrogen
is recycled as it is a reversible reaction
what happens to the gases in the haber process after going through the reactor
gases cooled and ammonia turns into liquid as the product (NH3) - used as fertiliser
