C2

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  • Created by: hope
  • Created on: 13-05-14 18:09
What happens when crude oil is refined?
The dead plants and animal remains formed billions of years ago to form. Crude oil will separate leaving it to turn into natural refined molecule
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Define density
A materials mass per unit
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Name 2 types of bond in crude oil
Covalent bonds and Intermolecular bonds
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What is the hardest material found in nature?
Diamond
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What is the difference between strength and stiffness?
Strength is when something lasts long with a lot of force, and stiffness is when you measure how easy it is to break something
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What's the advantage of synthetic rubber over natural rubber?
Synthetic rubber lasts longer than natural rubber
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Name a material that comes from a plant and an animal
Plant - wood (trees) Animal - wool (sheep)
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Name a material that is made of atoms of one element only
Carbon
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Give two examples of uses of nanomaterials
Seaspray and Combustion
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What is nanotechnology?
The branch of technology dealing with the making and use of nanoparticles
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What are the properties of a small crystalline polymer?
Straight chains with no branches (chains are then close together), Higher density, Stronger and Higher boiling point
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How do plasticisers work?
They are added to a polymer to make it softer and easier to shape. They get in between the polymer chains and reduce forces between them
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What would you add to a polymer to make it stiffer and stronger?
Crosslinks
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Polymer with a low melting point and is easily stretched has a...?
Weak force
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How does the arrangement of polymer chains affect the density of a material?
The way the polymer chains are layed out will effect the density because weak forces have low melting points and strong forces have high melting points
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Give an example of a product where a polymer has replaced a natural material
Plastic milk bottle, (Strong and rigid polymers such as high-density polyethene)
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What are most hydrocarbons in crude oil used to produce?
Fuels and Lubricants
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Describe polymerisation
Plastics are formed when lots of small molecules called monomers join together to make a long molecule called a polymer. They're carbon based, Under high pressure many small molecules join (polymerise) to form long chains called polymers
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5 useful products of crude oil
Petrol, Diesel, Kerosene (jet fuel), Bitumen (used for road surfacing), Refinery gas
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What does crude oil contain?
Hydrogen and carbon so you can separate it by fractional distillation
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Other cards in this set

Card 2

Front

Define density

Back

A materials mass per unit

Card 3

Front

Name 2 types of bond in crude oil

Back

Preview of the front of card 3

Card 4

Front

What is the hardest material found in nature?

Back

Preview of the front of card 4

Card 5

Front

What is the difference between strength and stiffness?

Back

Preview of the front of card 5
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