Haber Process Flashcards
Is the Haber process exothermic or endothermic?
Exothermic
Equation of Haber process
N2(g) + 3H2(g) <—> 2NH3(g)
Effect of low pressure on the Haber process
Low yield
Effect of high pressure on Haber process
High equipment cost
Uses of ammonia
Plastics
Fertiliser
Why use an iron mesh for the catalyst?
Huge surface area
Why does the catalyst have to be replaced?
Poisoned by impurities in gas stream
Raw materials for Haber process
Nitrogen from air
Hydrogen from methane & water
Specific conditions for Haber process
250 atm
670K
Effect of high temperature on Haber process
Goes in endothermic direction
Effect of low temperature on Haber process
Low rate of reaction
Steps in Haber process
1) H & N flow continuously over catalyst
2) Ammonia liquefied & piped off
3) Unreacted H & N fed back into reactor
Is Haber process reversible?
Yes
