The Haber Process — Past Paper Exam
15 Questions · 3 Sections · Equations, Raw Materials & Industrial Plant
🧠 The Golden Equation
NITROGEN
from Air
HYDROGEN
from Natural Gas
AMMONIA
recycled if unreacted
⚖️ Section AThe Equation
Write the balanced symbol equation for the Haber process. Include state symbols.
The Haber process is described as a reversible reaction. What does the symbol ⇌ mean in this context?
State the ratio of nitrogen to hydrogen molecules used in the Haber process. Explain what this ratio tells us about the amounts used.
How many moles of ammonia are produced from 2 moles of nitrogen in the Haber process (assuming complete reaction)?
The Haber process is an exothermic reaction in the forward direction. What does this mean, and how does it affect the temperature used industrially?
🪨 Section BRaw Materials
State the raw material used to obtain the nitrogen for the Haber process.
State the raw material used to obtain the hydrogen for the Haber process.
Describe how nitrogen is separated from air for use in the Haber process.
Describe how hydrogen is obtained from natural gas (methane) for use in the Haber process. Give a word equation.
Which row correctly shows the raw materials for the Haber process?
🏭 Section CThe Industrial Plant
In the industrial Haber process, the conversion of nitrogen and hydrogen to ammonia is not 100%. What happens to the unreacted nitrogen and hydrogen after the ammonia is removed?
State the temperature and pressure used in the industrial Haber process. Explain why these are described as 'compromise' conditions.
Name the catalyst used in the industrial Haber process and explain its role.
Describe how ammonia is separated from the unreacted gases in the Haber process plant.
Evaluate the Haber process. In your answer, refer to: (i) the economic importance of ammonia, (ii) the environmental impact of using natural gas as a raw material, and (iii) one way the process is made more sustainable.
Cambridge IGCSE Chemistry · Syllabus 0620 · Topic 6.3.6
Total: 30 marks · Core & Supplement
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