Chemistry

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Whats a polymer made up of
monomers joined together
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What is a polymer
a long chain of molecules
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what are addition polymers made up from
unsaturated monomers
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the monomers that make up addition polymers have what type of bonds
double covalent bonds
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what are molecules no double bond between carbon atoms are
saturated compounds
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what are molecules with atleast one covalent bond between carbons are
unsaturated compounds
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whats an unsaturated monomer molcule also known as
alkene
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What determines the properties of plastics
forces between molecules
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if the forces of plastic are weak then there are...
weak intermolecular forces
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if the forces of plastic are strong then there are...
covalent bonds
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properties of weak plastics
stretched easily, low melting point
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properties of strong plastics
rigid, cant be stretched, higher melting point
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why cant strong plastics be stretched
crosslinks hold the chains firmly together
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What are strong rigid polymers used for
milk bottles
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What are light strechable polymers used for
plastic bags, squeezy bottles
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PVC
Window frames and pipes
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polystyrene foam
packaging
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what polymer is a good thermal insulator
polystyrene foam
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name a synthetic polymer
nylon
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gortex is a mixture of what
nylon and polyrethane
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what 'film' makes gortex breathable
PTFE film
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hydrocarbons are also known as...
alkanes and alkenes
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hydrocarbons contain what atoms
hydrogen and carbon
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alkanes only contain what bonds
single bonds
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whats an alkene
hydrocarbon that only contains a single bond
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whats an alkane
hydrocarbon that only contains a double bond
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carbon always has to have ..... bonds to other atoms
4
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what happens to bromine water if an alkene is present
goes colourless
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which part of the fractional distillation column is coldest
top
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which part of the fractional distillation column is hottest
bottome
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which part of the fractional distillation column does the longest molecules go to
the bottom (to large to float)
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which part of the fractional distillation column does the smallest molecules go to
the top (to small to sink)
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long hydrocarbons have a high...
melting point
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small hydrocarbons have a low...
melting point
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what are the 7 different products of fractional distillation?
LPG, Petrol, naptha, kerosene, diesel, oil, bitumen
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What 4 things happen to hydrovarbon molecules as the size increases
boiling point increases, less flamable, more visious. less volatile
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whats cracking
splitting up of long chain hydrocarbons
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what are the conditions needed for cracking
high temp, a catalyst
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why do we use cracking
to help meet supply
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crude oil is a what source...
non renewable
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word equation of complete combustion
hydrocarbon+oxygen->carbon dioxide+water (+energy)
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what does incomplete combustion of hydrocarbons prodoce
carbon monoxide
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why is carbon monoxide called the 'silent killer'
colourless, odourless and posionus
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3 stages of the evolution of the atmosphere
1. volcanoes gave out steam and CO2 2.green plants evolved and produced oxygen 3. ozone layer allows evolution of complex animals
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what are the percentages of gas in our atmosphere
78% nitrogen, 21%oxygen, 0.035% carbon dioxide
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what is acid rain caused by
sulfur dioxide and oxides of nitrogen
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whys acid rain bad
kills fish, trees and statues
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what can oxides of nitrogen also produce
photochemical smog
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how is photochemical smog
air pollution caused by sunlight acting on oxides of nitrogen
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how does carbon monoxide kill people
limits the amount of oxygen the blood can carry
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what does a catalytic converter do
reduce the amount of carbon monoxide and nitrogen oxides a car produces
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Other cards in this set

Card 2

Front

What is a polymer

Back

a long chain of molecules

Card 3

Front

what are addition polymers made up from

Back

Preview of the front of card 3

Card 4

Front

the monomers that make up addition polymers have what type of bonds

Back

Preview of the front of card 4

Card 5

Front

what are molecules no double bond between carbon atoms are

Back

Preview of the front of card 5
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