the Code : CHE400

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CHE400_SP22_Assignmen....pdf Question 1. [20 marks] Using your own words and based on your understanding of life cycle assessment (LCA), explain the following sentence: LCA provides sets of modifications to be made to any part of a given system to achieve desired end-results of reducing environmental burdens. Refer to your slides and notes and even, search online for information. Cite all the references you used using the APA citing style. [5 marks for providing an accurate explanation, 10 marks for citing scientific publications on the topic, 5 marks for correct referencing). Question 2. [30 marks] Figure I displays a schematic representation of the life cycle assessment (LCA) conceptual model. Explain the importance of each entry shown on Figure 1. Then, adapt your explanation to a case dealing with the cradle-to-grave study of one piece of A4 paper (i.e. provide examples and references related to the given figure). [3 marks for providing an accurate explanation/entry, 10 marks for adapting the explanation to the provided scenario, 5 marks for correct referencing). t a Hus ment Goals roine ver Figure 1. Schematic of the LCA conceptual model Question 3. [30 marks] The life cycle assessment (LCA), as an environmental decision-making tool, has been gaining significant attention in recent years owing to its advantageous impacts from energetic as well as environmental perspectives. List its three main components for steps), explain (briefly) the main activities performed at each step and draw a schematic representation showing the hierarchy between these steps. Then, on that schematic. list three ideas for each analysis-related step considering an LCA study being conducted on the conversion of solar energy into electrical energy. [3 marks for listing. 2 marks for explaining each step, 3 marks for schematic drawing, 2 marks for providing idea/analysis step] Question 4. [20 marks] Imagine that you have been assigned to an LCA team working for the Canadian CIRAIG company. The project is about the environmental assessment of the process dealing with the conversion of ethylene into polyethylene. The team aims to identify all of the requirements needed at each LCA stage. Your part deals with gathering all needed information associated with raw material extraction and processing. Draw (i) a general schematic of a typical LCA scope and (ii) a flow diagram for raw materials extraction and processing. Then, answer the following questions: a) What are the raw materials needed to conduct such a study? Provide two examples. b) List two processes that could be employed for refining of raw materials. Explain briefly the mechanism of each process. c) Provide two examples related to physical and chemical characteristics of the refined materials. [5 marks for drawing the general schematie, 5 marks for drawing the specific schematie, 3 marks for listing raw materials, 5 marks for listing and explaining processes, 2 marks for listing examples on properties]