haber process

Question 1

temperature

Answer 1

450 ºC

Question 2

pressure

Answer 2

200 atm

Question 3

catalyst

Answer 3

Iron

Question 4

where does hydrogen and nitrogen obtain

Answer 4

Nitrogen - from the air
Hydrogen- from natural gas

Question 5

what is the main equation for making ammonia

Answer 5

N2 (g) + 3H2 (g) ⇌ 2NH3 (g)

nitrogen + hydrogen -> ammonia

Question 6

what happen to the unreacted H2 and N2

Answer 6

recycled back into the system and start over again

Question 7

why temperature

Answer 7

lower temperature
-> forward reaction as it is exothermic (releases heat)
-> a higher yield of products will be made

• However at a lower temperature the rate of reaction is very slow

> > > 450 ºC is a compromise temperature between having a lower yield of products but being made more quickly

Question 8

why catalyst

Answer 8

It allows for an acceptable yield to be achieved at a lower temperature by lowering the activation energy required
-> without affecting the the position of equilibrium

Question 9

why pressure

Answer 9

• higher pressure - higher yield of product
• but higher pressure = need expensive equipment + Dangerous

> > > 200 atm = balance between lower yield of products + safely and economically