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Global challenges answer explanations

Review worked answers and explanations for Global challenges. Aligned to OCR Gcse Chemistry A Gateway.

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A company manufactures plastic chairs. They conduct a Life Cycle Assessment (LCA) to compare two different designs, Chair A and Chair B, focusing on their carbon footprint across key stages. The results are shown in the table below: | LCA Stage | Chair A (kg CO₂ equivalent) | Chair B (kg CO₂ equivalent) | |------------------------|-----------------------------|-----------------------------| | Raw Material Extraction| 3.2 | 2.8 | | Manufacturing | 5.8 | 6.5 | | Transport & Packaging | 1.5 | 1.2 | | Use & Maintenance | 0.1 | 0.1 | | Disposal | 0.4 | 0.3 | 1. Calculate the total carbon footprint for Chair A and Chair B. 2. Identify which stage contributes the most to the carbon footprint for Chair A. 3. Based on the data, state which chair has a lower overall environmental impact in terms of carbon footprint. Justify your answer. [6 marks]

Global challenges answers | OCR GCSE Chemistry A Gateway | ExamCompanion