haber process Flashcards
what does the haber process produce
ammonia
what is ammonia used for
fertilisers and the making of nitric acid
The structure of ammonia
N
/ | \
H H H
How many stages are there in the haber process
5
the first stage of the haber process
Hydrogen and nitrogen mixed and cleaned
the second stage of the haber process
the hydrogen and nitrogen are compressed
the third stage of the haber process
An iron catalyst is used. This is when the ammonia is made
the fourth stage of the haber process
The ammonia is condensed into a liquid (cooled) and stored
the fifth stage of the haber process
unreacted hydrogen and nitrogen are recycled and used in the process again
formula for ammonia
NH3
What is a problem with the reaction
its a reversible reaction
How do you know the reaction is reversible
there’s arrows rather than an equals sign
Why is it bad that the reaction is reversible
The ammonia can change back into its reactants easily
equation of the haber process (making of ammonia)
N2(g) + 3H2(g) -> 2NH3(l)
what is the yield
the amount of ammonia produced
what is the temperature of the haber process
450 degres
what is the pressure of the haber process
200 atmosphere
What catalyst is used in the haber process
iron catalyst
why is temperature taken in to consideration in the haber process
moderate/low temperature= reaction too slow but makes more ammonia
high temperature=reaction faster but makes less ammonia and is more expensive
Why is pressure taken into consideration in the haber process
higher the pressure the more quickly ammonia is made however when the pressure increase the cost does too
why is a catalyst used in the haber process
speeds up the reaction while saving energy costs
why are unreacted nitrogen and hydrogen used again
to save money
why is the ammonia condensed
when ammonia is a liquid its easier to extract
Why did they come to a compromise with temperature and pressure when making ammonia
so they can make a reasonable yield for a reasonable time that is not to expensive
What is the most important factor when deciding the conditions of the haber process
running costs not the yield
what do they need to think about when it comes to running cost
energy used, getting raw materials, workers wages, equipment, conditions
