A clothing manufacturer is choosing a fibre for work jackets. Jackets made from the three fibres provide the same warmth and have the same expected working life.
The table gives information about making the jackets. For polyester, the raw resource is a fossil fuel.
| Fibre | Manufacturing energy for one jacket in kJ | Fibre input discarded during cutting (%) | Raw resource used by the factory each year in tonnes | Raw resource replaced by regrowth or formation each year in tonnes |
|---|---|---|---|---|
| Cotton | 36 000 | 16 | 120 | 135 |
| Wool | 44 000 | 7 | 80 | 92 |
| Polyester | 21 000 | 3 | 55 | 0 |
An order is placed for 650 wool jackets. Calculate the total manufacturing energy for this order.
Evaluate the sustainability of using each fibre for the work jackets. Decide which fibre the manufacturer should use.
87 exam-style questions on AQA GCSE Chemistry 10.1 Using the Earth's resources and obtaining potable water, covering 10.1.1 Using the Earth's resources and sustainable development, 10.1.2 Potable water, 10.1.3 Waste water treatment, and 10.1.4 Alternative methods of extracting metals. Each one has a worked solution and a mark scheme showing where the marks go.