Sustainability and life cycle assessment questions Q1.Plastic bags have a high 'carbon cost"The "carbon cost" depends on the amount of carbon dioxide emitted in making and transporting the product The more carbon dioxide emitted, the higher the 'carbon cost". (a)Plastic water bottles are made from a polymer.The polymer is made from ethene. Ethene is made by cracking hydrocarbons. Name the polymer made from ethene. __ (1) (ii) Ethene can be made by cracking the hydrocarbon pentane, C_(5)H_(12) C_(5)H_(12)arrow C_(2)H_(4)+C_(3)H Explain why there is a 'carbon cost' for the process of cracking a hydrocarbon.

Question

Question

Sustainability and life cycle assessment questions Q1.Plastic bags have a high 'carbon cost"The "carbon cost" depends on the amount of carbon dioxide emitted in making and transporting the product The more carbon dioxide emitted, the higher the 'carbon cost". (a)Plastic water bottles are made from a polymer.The polymer is made from ethene. Ethene is made by cracking hydrocarbons. Name the polymer made from ethene. __ (1) (ii) Ethene can be made by cracking the hydrocarbon pentane, C_(5)H_(12) C_(5)H_(12)arrow C_(2)H_(4)+C_(3)H Explain why there is a 'carbon cost' for the process of cracking a hydrocarbon.

Answer 1

【Explanation】: (i) The query requires answering the polymer name generated from the compound 'ethene'. Polymers are huge molecules synthesized by repeating sub-units known as 'monomers'. In this case, the arguable monomer is ethene. When ethers undergo a chemical procedure referred to as 'polymerization', they compound together to form a polymer. For ethene \(( \mathrm{C}_{2} \mathrm{H}_{4} )\), the polymer that is generated is Polyethylene. 【The Answer for Part i】: The polymer made from ethene is Polyethylene. (ii) This objective checks for comprehension about what a 'carbon cost' suggest in relation to environmental & industrial eco-efficiency, and specifically what results in 'carbon cost' when hydrocarbons like pentane (\(\mathrm{C}_{5} \mathrm{H}_{12}\)) are subjected through 'cracking' to produce ethene (\(\mathrm{C}_{2} \mathrm{H}_{4}\)). Cracking is the procedure where lengthy-chained hydrocarbons from fossil fuels are broken down into petite/momentous, more useful chains, like ethene and propane (\(\mathrm{C}_{3} \mathrm{H}_8\) - you possibly gave a typo). Effectively cracking these hydrocarbons need extensive quantity of energy. Often this energy is created from the burning of fossil fuels additional release of greenhouse gases into the atmosphere such as carbon dioxide \(( \mathrm{CO}_2 )\). This process evolves carbon cost. Consequently, energy and fossil fuel substitutes require to be utilized that result in reduced \(\mathrm{CO}_2\) emission and GRA, to shrink that carbon cost. Moreover, during cracking, unreacted hydrocarbon residues can escape all the way into ambiance. These are potent greenhouse gases that also raise the carbon cost of the process. Finally, the complete polymer construction process will additional supplement onto this cost, as well the circulation of those polyethylene products. The greater thousands serve a geographically sprawling market; supersedes toughness of the network (& therefore timely delivery), increment canvassing the carbon cost. 【The Answer for Part ii】: There is a notable 'carbon cost' attached to the making of ethene via a procedure like 'cracking' because of reasons like: 1. the extensive degree of energy prerequisites (usually through burning of other carbon-heavy sources like fossil fuels) that directly attributes to carbon emissions increased into our atmosphere, 2. the resultant unreacted hydrocarbon escape into the surrounding contributing to increased temperature & greenhouse effect, 3. and the increased cost of the transit, primary production or purification processes contributing to the increased carbon footprint be causation of face of geographically stretching markets purposely target edby producers of polymers like Polyethylene.

Question

Answer

Answer

Hot Questions