The production of ammonia Flashcards
What is the Haber process used for?
The production of ammonia.
What are the 2 raw materials for the Haber process?
- Nitrogen.
2. Hydrogen.
How is nitrogen taken for use in the Haber process?
From the fractional distillation of liquid air.
How is hydrogen taken for use in the Haber process?
From natural gas and steam.
What method is used in the Haber process?
- Pass the purified nitrogen and hydrogen over an iron catalyst at about 450^o and about 200 atmospheres (high temperature and pressure).
- Some of the hydrogen and nitrogen reacts to form ammonia.
- The ammonia produced can break down again into nitrogen and hydrogen.
Why can ammonia be recycled in the Haber process?
Because it is a reversible reaction.
What is the word equation for the production of ammonia?
nitrogen + hydrogen -> ammonia
What is the balanced symbol equation of the production of ammonia?
N2 +3H2 -> 2NH3
Why does the Haber process occur at a high temperature and pressure?
To produce a reasonable yield of ammonia quickly. Even so, only some of the hydrogen and nitrogen react together to form ammonia.
What happens in a closed system?
No reactants are added and no products are removed.
What happens when a reversible reaction occurs in a closed system?
An equilibrium is achieved when the reactions occur at exactly the same rate in each direction. The relative amounts of all the reacting substances at equilibrium depend on the conditions of the reaction.
What happens if the temperature is raised in an exothermic reaction?
The yield decreases.
What happens if the temperature is lowered in an exothermic reaction?
The yield increases.
What happens if the temperature is raised in an endothermic reaction?
The yield increases.
What happens if the temperature is lowered in an endothermic reaction?
The yield decreases.
