Table 1 shows information on the life cycle assessments (LCAs) of two types of disposable drinking cups.
| Information | Polylactic acid (PLA) cups | Polystyrene (PS) cups |
|---|---|---|
| Raw materials | Corn starch (biomass) | Crude oil |
| Mass of 1 cup in g | 18.6 | 11.5 |
| Energy to produce 1 cup in kJ | 720 | 410 |
| Biodegradable | Yes | No |
| Recyclable | Yes | Yes |
Calculate the energy needed to produce 3.50 kg3.50\text{ kg}3.50 kg of polylactic acid (PLA) cups.
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.