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3933416
Other Substances from Crude Oil
Descrição
GCSE Chemistry Mapa Mental sobre Other Substances from Crude Oil, criado por donnapumpkin em 02-11-2015.
Sem etiquetas
chemistry
gcse
c1 revision
chemistry
gcse
Mapa Mental por
donnapumpkin
, atualizado more than 1 year ago
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Criado por
donnapumpkin
aproximadamente 9 anos atrás
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Resumo de Recurso
Other Substances from Crude Oil
Cracking
the process of using heat to turn large hydrocarbons into smaller, more useful molecules
Alkenes
A group of unsaturated hydrocarbons
double bonds in alkenes make them much more reactive than alkanes
this makes alkenes extremely useful
Unsaturated
when hydrocarbons like alkenes have a double bond and so have the potential to bond with extra hydrogen atoms
Bromine water
used to test for alkenes
if hydrocarbon contains double bonds then bromine water changes from orange to colourless
the more bromine water used the more double bonds in the chemical
Monomers
Polymers
Polymerisation
chemical reaction that changes monomers to polymers
Smart polymers
polymers that may have properties changed by light, temperature of by other changes in their surroundings
a long molecule made of lots of monomers joined together
small molecules
Biodegradable plastics
plastic made with corn starch that will break down naturally
Ethanol
Fermentation
chemical process carried out by yeast that turns sugar into ethanol + carbon dioxide
Advantages
low temperature
renewable
little energy needed
Disadvantages
batch process
slow
impure - need treatment to purify
high man power
Hydration
reacting ethane with steam to make ethanol
Advantages
continuous process
fast
low man power
Disadvantages
high temperature & pressure
non-renewable
lots of energy needed
chemical in a group of alcohols
can be made from sugar and used as a fuel
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