Haber process

In the Haber process, nitrogen and hydrogen react to form ammonia.

What is the source of the hydrogen?

• air

• oil

• limestone

• sulfuric acid

Which statement about the manufacture of ammonia by the Haber Process is correct?

• The reactants and product are elements.

• The reactants and product are gases.

• The reactants and product are compounds.

• The reactants are both obtained from the air.

In the Haber process, nitrogen and hydrogen react to form ammonia.
N2(g) + 3H2(g)  $\leftrightarrow$   2NH3(g); ∆H = –92 kJ / mol
Which factor increases both the speed of reaction and the amount of ammonia produced? 

• addition of a catalyst

• decreasing the temperature

• increasing the pressure

• increasing the temperature

Which statement about ammonia is correct?

• It is a colourless, odourless gas.

• It is a gas which turns damp blue litmus paper red.

• It is formed when potassium nitrate is heated with aqueous sodium hydroxide and aluminium.

• It is manufactured using vanadium(V) oxide as a catalyst.

All ammonium salts on heating with sodium hydroxide produce ammonia gas.

From which ammonium salt can the greatest mass of ammonia be obtained?

• 0.5 mol (NH₄)₃PO₄

• 0.5 mol (NH₄)₂SO₄

• 1.0 mol NH₄Cl

• 1.0 mol NH₄NO₃

Which compound when reacted with sulfuric acid produces a product which is used as a fertiliser?

• ammonia

• calcium carbonate

• calcium hydroxide

• sodium hydroxide

Which compound produces the greatest number of ions when 1 mole is dissolved in water?

• aluminium sulfate

• ammonium carbonate

• ammonium nitrate

• calcium nitrate

The equation for the reaction taking place during the production of ammonia is shown.
N2(g) + 3H2(g)  $\leftrightarrow$   2NH3(g)              ΔH = –92 kJ / mol
The reaction is carried out between 350 °C and 450 °C and at around 200 atmospheres pressure using an iron catalyst.
Which statement is not correct?

• At higher temperatures the amount of ammonia present at equilibrium is less.

• Changing the pressure has no effect on the rate of reaction.

• The catalyst is used to speed up the reaction.

• When the reaction is at equilibrium, the forward reaction is taking place at the same rate as the backward reaction.

The reaction shown for the Haber process can reach equilibrium.

N₂(g) + 3H₂(g) ⇌2NH₃(g)

Which row shows the gases present at equilibrium?

• N2 = No; H2 = No; NH3 = Yes

• N2 = No; H2 = Yes; NH3 = Yes

• N2 = Yes; H2 = No; NH3 = Yes

• N2 = Yes; H2 = Yes; NH3 = Yes

The diagram shows a flow chart for the manufacture of fertiliser.

• W= H2; X= N2; Y= high; Z=NH3

• W= O2; X= SO2; Y= high; Z=SO3

• W= O2; X= SO2; Y= low; Z=SO3

• W= N2; X= H2; Y= high; Z=NH3