GCSE Edexcel Chemistry Combined Science Collision Theory & Activation Energy: Ammonia is made by reacting nitr

Question

Ammonia is made by reacting nitrogen with hydrogen.

(a) The nitrogen and hydrogen are obtained from raw materials.

Draw one straight line from each gas to the raw material it is obtained from.

--

Hydrogen  --->  air

Nitrogen --->  natural gas

(b) When nitrogen and hydrogen are reacted together, the reaction can reach a dynamic equilibrium.

Use words from the box to complete the sentences about dynamic equilibrium.

In a dynamic equilibrium two reactions occur at the same time.

These are the forward reaction and the _____________ reaction.

The rates of the two reactions are _____________.

(c) The reaction between nitrogen and hydrogen happens at a pressure of 200 atmospheres.

Another unit of pressure is Pascals, Pa (1 atmosphere = 101 325 Pa).

Calculate the value of 200 atmospheres in Pascals.

Pressure = _____________ Pa

(d) Figure 3 shows molecules of nitrogen, hydrogen and ammonia before the reaction and at equilibrium.

(i) Complete the table showing

- the number of hydrogen molecules before reaction

- the number of hydrogen molecules at equilibrium

- the change in the number of hydrogen molecules.

number of molecules before reaction

Nitrogen

Hydrogen

Ammonia

number of molecules at equilibrium

change in number of molecules

(ii) Complete the equation for this reaction.

____________ + ______________ = 2 NH₃

Ammonia is made by reacting nitrogen with hydrogen - Edexcel - GCSE Chemistry Combined Science - Question 3 - 2021 - Paper 1