The Haber Process

Question 1

How is the Haber process used?

Answer 1

To manufacture ammonia, which is used to produce nitrogen-based fertilisers

Question 2

What are the raw materials needed for this process?

Answer 2

• Purified nitrogen - from the fractional distillation of liquid air
• Hydrogen - from natural gas or steam

Question 3

The nitrogen and hydrogen are passed over a an iron catalyst catalyst at a?

Answer 3

• Moderately high temperatures around (450 degrees)

* High pressure (about 200 atmosphere)

Question 4

On cooling the ammonia liquifies and can be removed from he mixture.

The unreacted nitrogen and hydrogen are recycled.

Answer 4

Nitrogen + hydrogen —> ammonia

(Reversible reaction)

Question 5

The reaction between nitrogen and hydrogen is?

Answer 5

Exothermic

Question 6

What would a high temperature do to the reaction?

Answer 6

Faster rate of reaction

Low yield

Question 7

A low reaction temperature would?

Answer 7

Lower rate of reaction and and produce high yield

Moderate temperatures are used.

Question 8

Why are fertilisers used?

Answer 8

To replace essential elements found in soil that are used up by plants to grow