CourseCourseConceptConceptDocumentDocument

Edexcel A-Level Chemistry AS 9.7 The Use of Catalysts in Industry to Make Processes More Sustainable By Using Less Energy and or Higher Atom Economy Questions

Practise Edexcel IAL Chemistry 9.7 by evaluating lower-temperature catalysis, energy or fuel savings, useful by-products and operating costs.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • Explain that a catalyst permits a lower temperature and therefore less energy or fuel use.
  • Evaluate a catalysed route using useful by-products, atom economy and operating temperature.

Edexcel A-Level Chemistry AS 9.7 The Use of Catalysts in Industry to Make Processes More Sustainable By Using Less Energy and or Higher Atom Economy Questions question 1

[Maximum number: 1]

Ammonium nitrate, NH4NO3\mathrm{NH}_{4} \mathrm{NO}_{3}, is used in the manufacture of fertilisers and explosives. It is produced on a large scale using only methane, water and air.
The process has four stages.

The reaction in Stage 2 has an activation energy, Ecat =+70 kJ mol−1E_{\text {cat }}=+70 \mathrm{~kJ} \mathrm{~mol}^{-1}.

The uncatalysed reaction between N2\mathrm{N}_{2} and H2\mathrm{H}_{2} has an activation energy, Ea=+290 kJ mol−1E_{\mathrm{a}}=+290 \mathrm{~kJ} \mathrm{~mol}^{-1}.

Suggest why the use of the catalyst makes Stage 2 more sustainable.

All question bank results loaded