Crude Oil
- Created by: HLeiper
- Created on: 17-04-14 14:10
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- Crude Oil
- Mixture of hydrocarbons
- How it works
- Oil is heated and the different hydrocarbons have different boiling points so they all condense at different temperatures
- Longer hydrocarbons collect at the bottom - high boiling points
- Shorter hydrocarbons collect at the top - low boiling point
- Incomplete combustion of fuels
- Produces carbon monoxide
- Poisonous because it reacts with haemoglobin in blood cells - carries less oxygen
- Sulphur dioxide and Nitrogen Oxide
- In car engines - temperature high enough nitrogen reacts with oxygen
- Lead to acid rain - SO4 and NO2 make rain more acidic
- Cracking
- Necessary because long-chain hydrocarbons cannot be used directly and not enough short-chain hydrocarbons
- Heat paraffin and a silica or alumina catalyst alternately at 600-700 degrees
- Paraffin cracks - alkanes collect at the bottom of the boiling tube and alkenes colleccted through water and a glass jar
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