Revision of Core Chemistry 1b
- Created by: connie33
- Created on: 05-04-15 12:45
Cracking is the breaking down of hydrocarbons into smaller chains
A typical substance that is cracked is kerosene, the products you get are ethene for plastics and octane petrol.
Alkenes have double carbon-carbon bonds
The general formula for alkenes is CnH2n
The general forumla for alkanes is CnH2n+2
This is the structure of ethene
When ethene is hydrated with steam it forms ethanol
Polymers are long chain molecules of small alkene molecules
Factors that affect the properties of polymers are: Temperature at which they are made and pressure at which they are made
Uses of polymers include: smart materials, plastics e.g plastic bags, lycra and waterproof coatings
Polymers might become expensive because they are made from crude oil which is a finite resource
Some oils needs to be distilled after extraction because they are impure
Advantages of cooking with oil include: improved taste and gives the food more energy
Another use of vegetable oil is as a biofuel
Unsaturated…
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