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Powerpoint Description:Use this slideshow to help you teach the Chemistry Global Challenges topic. It covers: extracting metals and how it is done, linking reactivity to the extraction process, how electrolysis works, what happens during electrolysis, biological ways to extract metals (bioleaching and phytomining), making ammonia, the Haber Process, how the equilibrium in the Haber Process is affected by temperature and pressure, the Contact Process, the economics of the Contact Process, drawing graphs of reaction conditions vs rate, ammonium-based fertilisers and how they are made, making ammonium sulfate in a lab, Life Cycle Assessments, an example LCA (the carrier bag), recycling and why we do it, recycling metals and glass, viability of recycling, alloys, using impurities to strengthen iron, making steel, why iron rusts, ways to prevent rust, galvanising and sacrificial protection, ceramics, polymers, composite materials, hydrocarbons and crude oil, general formulae for alkanes and alkenes, functional groups, alcohols, carboxylic acids, burning hydrocarbons, reactions of alkenes, oxidation of alcohols, monomers and polymers, condensation polymerisation, making a polymer (nylon) by condensation polymerisation, DNA, fractional distillation, using crude oil for fuels and feedstock, how to crack an alkane, alkaline batteries compared to rechargeable batteries, fuel cells and how they work, the evolution of the Earth's atmosphere, changes in levels of oxygen and carbon dioxide as the Earth's atmosphere evolved, carbon dioxide and global warming, the Greenhouse Effect, how humans cause greenhouse gases to be emitted, the effects of global climate change, how to reduce global warming, pollution, other products of burning fuels, water and how it is made potable, other ways to treat water, fertilisers and their uses.
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