C2

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what are the 2 types of materials?
natural and synthetic
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what is crude oil made of?
a mixture of hydrocarbons
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how is crude oil separated?
fractional distillation - evapourating the mixture and separating the chains based on their length and boiling point
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what jobs do the fractions have?
petrol, kerosene and bitumen (lots more)
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what determines somethings boiling point?
it is the energy needed to break the inter molecular forces between the molecules (the longer the chain, the bigger inter molecular force)
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what is polymerisation?
the process where monomers join to make polymers
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humans make polymers because...
you can change the property's of a material
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what do cross-links do?
they are strong covalent bonds between molecules that make molecules stiff and soild
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what are plasticizers/
molecules between polymer chains which make materials more dense
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what is crystalline?
it is when the chains of a polymer are closer together making materials more dense/strong due to the extra inter molecular forces
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what is a nanometre?
one millionth of a millimetre
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what are nanoscale particals and how do they occur?
they occur naturally (sea spray), or are made accidentall/on purpose by humans. they are used to modify the properties of materials.
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you are some people concerned about nano particles?
because they are not fully tested and could lead to health problems
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Other cards in this set

Card 2

Front

what is crude oil made of?

Back

a mixture of hydrocarbons

Card 3

Front

how is crude oil separated?

Back

Preview of the front of card 3

Card 4

Front

what jobs do the fractions have?

Back

Preview of the front of card 4

Card 5

Front

what determines somethings boiling point?

Back

Preview of the front of card 5
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