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the haber process
Transcript of the haber process
a high temperature - about 450ºC
a high pressure - about 200 atmospheres (200 times normal pressure)
an iron catalyst The reaction is reversible.
nitrogen + hydrogen = ammonia
N2(g) + 3H2(g) = 2NH3(g)
The (g) indicates that the substance is a gas.
The flow chart shows the main stages in the Haber process. and that was.. . by.. Farm Zelda AND.. Drama! Science The catalyst is actually slightly more complicated than pure iron. It has potassium hydroxide added to it as a promoter - a substance that increases its efficiency.
The pressure varies from one manufacturing plant to another, but is always high. You can't go far wrong in an exam quoting 200 atmospheres.
At each pass of the gases through the reactor, only about 15% of the nitrogen and hydrogen converts to ammonia. (This figure also varies from plant to plant.) By continual recycling of the unreacted nitrogen and hydrogen, the overall conversion is about 98%.