An industrial chemical plant aims to transition to a more sustainable manufacturing process for acrylic acid. To scientifically evaluate and improve the environmental profile of the proposed synthetic route compared to the existing fossil-derived route, the sustainability team conducts a standardized Life Cycle Assessment (LCA) under ISO 14040.
The four key methodological phases of conducting this LCA are shown below in a randomized order:
| Phase | Description / Activity |
|---|---|
| P | Life Cycle Impact Assessment (LCIA): Evaluating the significance of potential environmental impacts (e.g., global warming potential, acidification) based on the flow data. |
| Q | Goal and Scope Definition: Specifying the system boundaries, functional unit, and the reasons for carrying out the study. |
| R | Interpretation: Combining findings from the previous phases to deliver conclusions, identify limitations, and make recommendations for process improvement. |
| S | Life Cycle Inventory (LCI): Quantifying the material, energy, and emission inputs and outputs throughout the defined life cycle of the process. |
What is the correct methodological sequence of these phases during a standard LCA?
S, Q, P, R
Q, P, S, R
Q, S, P, R
Q, S, R, P
81 exam-style questions on OCR GCSE Chemistry Improving processes and products. Each one has a worked solution and a mark scheme showing where the marks go.