The production of ammonia Flashcards
1
Q
Which raw material is nitrogen obtained from? [1]
A
air
2
Q
Explain why a temperature of 450°C is the optimum temperature for the Haber process. [2]
A
- a higher temperature would reduce (equilibrium) yield
- a lower temperature would reduce rate
3
Q
Why is a pressure lower than 200 atmospheres not used for the Haber process? [1]
A
it would produce a lower yield
4
Q
Explain how ammonia is separated from unreacted nitrogen and hydrogen in the Haber process. [2]
A
- (gases) get cooled
- ammonia gets liquefied
5
Q
Hydrogen gas is obtained from methane. Name one source of methane. [1]
A
natural gas
6
Q
Air is the source used to produce nitrogen for the Haber process. Suggest why air must not get into the reactor. [2]
A
- air contains oxygen
- this would react with hydrogen
7
Q
Describe what happens to the mixture of gases from the reactor. [3]
A
- the mixture of gases get cooled
- ammonia condenses / liquefies
- nitrogen and hydrogen (remain as gases and) are returned to the reactor
