c2 flashcards

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  • Created by: saradomi
  • Created on: 16-04-14 14:13
what is tensile strength?
how much a material can resist a pulling force
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what is compressive strength?
how much a material can resist a pushing force
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what is crude oil?
a mixture of hydrocarbons
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what are the two types of bond in crude oil?
there is the strong covalent bond between the carbons and hydrogens within hydrocarbon molecule and there is the inermolecular forces of attraction between different hydorcarbon molecules in the mixture
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what is the process of separating crude oil called and how is is done?
the process is called refining and it is done by fractional distillation
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what happens in fractional distillation?
the hydrocarbons are separated into groups with different boiling points
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how are plastics formed?
when lots of small molecules called monomers join together to make a long molecule called a polymer
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how can a polymer be made stronger?
cross links can be added, they bond the chains together making them stronger, stiffer and more heat resistant
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how can a polymer be made softer?
plasticisers can be added, they get in between the polymer chains and reduce the forces between them
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what are the properties of a crystalline polymer?
a crystalline polymer has straight chains with no branches so the chains fit close together, they have a higher density, are stronger and have a higher melting point
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Other cards in this set

Card 2

Front

what is compressive strength?

Back

how much a material can resist a pushing force

Card 3

Front

what is crude oil?

Back

Preview of the front of card 3

Card 4

Front

what are the two types of bond in crude oil?

Back

Preview of the front of card 4

Card 5

Front

what is the process of separating crude oil called and how is is done?

Back

Preview of the front of card 5
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