Table 1 shows information on the life cycle assessments (LCAs) of disposable drinking straws.
| Information | PLA straws | Polypropylene straws |
|---|---|---|
| Raw materials | Corn starch | Crude oil |
| Mass of 1 straw in g | 1.85 | 1.15 |
| Energy to produce 1 straw in kJ | 45.0 | 72.5 |
| Biodegradable | Yes (industrial) | No |
| Recyclable | No | Yes |
Calculate the energy needed to produce 7.50 kg7.50\text{ kg}7.50 kg of PLA straws.
Use Table 1.
Give your answer in standard form to 3 significant figures.
9 exam-style questions on AQA GCSE Chemistry 10.2 Life cycle assessment and recycling, covering 10.2.1 Life cycle assessment and 10.2.2 Ways of reducing the use of resources. Each one has a worked solution and a mark scheme showing where the marks go.