The Haber Process Flashcards
Give the symbol formula for ammonia.
NH3
What does the haber process produce?
Ammonia
What two elements are required to make ammonia?
Nitrogen and hydrogen
Give the symbol equation for producing ammonia. ( include state symbols)
N2(g) + 3H2 (g) ↔️ 2NH3 (g) (+ heat)
What percentage of the air is nitrogen?
78%
From where is the hydrogen obtained?
From natural gas or cracking hydrocarbons.
What type of reaction is the haber process?
Reversible
Industrial conditions: temperature?
450C
Industrial conditions: catalyst
Iron
Industrial conditions: pressure
200 atmospheres
Why does higher pressures favour the forward reaction?
Because there are 4 molecules on the left hand side for every 2 on the right.
Why is the pressure 200 atmospheres?
To make it as high as possible - to get the best yield without making the plant too expensive to build.
Is the forward reaching exo or endothermic.
Exothermic
Why would the yield of ammonia actually be greater at lower temperatures?
Because the forward exothermic reaction means that increasing temp. would move the equilibrium the wrong way - away from ammonia and towards the reactants.
Why are low temperatures not used in the haber process.
Because the rates of reaction are much slower.
