C1.5 - Products from Oil
- Created by: alishamunson
- Created on: 09-04-17 16:15
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- C1.5 - Products from Oil
- 5.1
- Hydrocarbon molecules can be broken down by heating them with steam to a very high temperature or by passing their vapours over a hot catalyst.
- Cracking produces alkanes and alkenes.
- Alkenes are unsaturated hydrocarbons.
- Alkenes turn bromine water from orange to colourless.
- 5.2
- Plastics are made of polymers.
- Polymers are large molecules made when many small molecules (monomers) join together.
- Alkanes can be used to make polymers such as poly(ethene) and poly(propene)
- 5.3
- New polymers are being developed all the time.
- Polymers are designed to have properties that make them specially suited for certain uses.
- We are now recycling more plastics and finding new uses for them.
- 5.4
- Non-biodegradab-le plastics cause unsightly rubbish, can harm wildlife and take up space in landfill sites.
- Biodegradab-le plastics are decomposed by the action of microorganis-ms in soil.
- Making plastics with starch granules in their structure helps the microorganis-ms break down a plastic.
- We can make biodegradab-le plastics from plant materials like cornstarch.
- 5.5
- Ethanol can be made by fermenting sugar using enzymes in yeast.
- Ethanol can also be made by hydration of ethene with steam in the presence of a catalyst.
- Using ethene to make ethanol needs non-renewable crude oil whereas fermentation uses renewable plant material.
- 5.1
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