Haber Process HSC Style Questions

  • Equilibrium Questions & Haber Process
  • When evaluating an industrial chemical synthesis process, consider the following factors:
    • availability of reagents, reaction conditions, yield and purity
    • industrial uses (eg pharmaceutical, cosmetics, cleaning products, fuels)
    • environmental, social and economic issues

Potential Short Answer Questions

Exam type 5 markers

Question 1.

Explain the conditions used in the haber process. [5 marks]

Question 2.

Evaluate the contribution of the haber process to society [5 marks]

Question 3.

The contact process is used for the synthesis of sulfuric acid, note you haven’t learnt this in class and this question requires you to apply your understanding.

Justify the requirements for a plant which would be used for the above contact process. [5 marks]

2017 HSC Chemistry

  • Demonstrate understanding of reaction rate and % yield

La chatliers principle

  • Adding reactant (shift equilibrium position to right)
  • Remove product (shift equilibrium position to right)
  • Pressure is high, 200 atm (shift equilibrium position to right) – financial cost of high pressure
  • Temperature is lower, 450 degrees celsius → balancing point between yield and reaction rate

Reaction Rate

  • Catalyst is present, iron catalyst, increases rate of forward and reverse equally by lowering activation energy
  • Balance with temp, high enough for fast reaction as said above

2016 HSC Chemistry

  1. At time 2 mins dynamic equilibrium first reached, the concentration of reagents and products first plateau, since the forward and reverse reaction rates are equal.
  2. Increasing temperature, increased reactants and reduced products, therefore, increasing temp increased reverse reaction. Therefore, forward reaction is exothermic. Reverse decomposition  is endothermic.

Multiple Choice To Check Your understanding.

2020 HSC

2019 HSC

2017 

2020 HSC Answers
16C
19D
2019 HSC Answers
12C
16B
17D
2017 HSC Answers
16B
18D

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