Chemistry: Polymers, monomers, crude oil, cracking and hydrocarbons.

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what is a polymer?
A long molecule made by joining lots of smaller molecules (monomers) together.
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What happens in the cracking process?
Large alkane molecules are broken down into smaller alkane molecules and a small alkene molecule is also produced.
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Why is the fermentation process for making alcohol carried out at 37° ?
Yeast is a living organism which contains enzymes. Enzymes work best at body temperature.
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Which gas is responsible for acid rain?Where does this gas come from?
Sulphur dioxide. Produced from burning coal or other fossil fuels.
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What is the word for a material that won't decompose?
Non-biodegradable.
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What is thermal decomposition?
Breaking down a molecule using heat.
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Give 3 reasons why it is good to reuse plastic washing up bottles?
Saves raw materials (crude oil). Saves energy. Reduces the amount of carbon dioxide being released into the atmosphere. Reduces global warming.
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Which Polymer is made from the monomer Ethene?
Polyethene.
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What are hyrdrocarbons made up of?
Hydrogen and Carbon (only)
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Give a reason why putting unwanted plastic in landfill is a problem.
Because they are non-biodegradable/ landfills will become full.
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State 2 effects of global warming?
Polar ice caps melt. Weather patterns change causing extremes of weather (droughts/flooding).
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Name 2 ways ethanol can be produced.
Fermentation. Adding ethene to steam.
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Explain the process of polymerisation.
Lots of monomers such as ethene join together to make a long chain molecule called a polymer.
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What is the function of a catalyst?
A catalyst speeds up the reaction without being used up in the reaction.
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Which family of hydrocarbons has only single bonds between carbon atoms?
The alkanes.
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What is a monomer?
a small molecule that can be joined into long molecules.
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What is an everyday word for polymer?
Plastic.
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What do you call the method used to separate mixtures of liquids like crude oil?
Fractional distillation.
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What chemical is used to test for a double bond? What colour change do you observe?
Bromine water. Which is an orange liquid that goes colourless when it reacts with double bonds
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Give a disadvantage of recycling plastics?
Need to separate the plastics before they can be reused. Need to organise for the unwanted plastics to be collected
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In the cracking process long chain hydrocarbons are broken down into short chain hydrocarbons. Why do we need to do this?
The short chain hydrocarbons are in demand as petrol and we have too many of the long chain hydrocarbons.
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List the advantages of making ethanol by fermentation rather than from ethane.
Fermentation uses sugar which is a renewable resource. Do not have to use up crude oil reserves if we use fermentation.
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List 2 advantages of using ethene to make ethanol rather than fermentation.
Alcohol produced from ethene is 100% and does not need to be distilled The ethene process is a continuous process and is only stopped if something goes wrong. It does not rely on living things like fermentation which relies on yeast.
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What 4 things could happen to an unwanted washing up liquid bottle?
It could go to landfill. It could be reused. It could be burnt to give off heat. It could be melted down and made into new items.
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Other cards in this set

Card 2

Front

What happens in the cracking process?

Back

Large alkane molecules are broken down into smaller alkane molecules and a small alkene molecule is also produced.

Card 3

Front

Why is the fermentation process for making alcohol carried out at 37° ?

Back

Preview of the front of card 3

Card 4

Front

Which gas is responsible for acid rain?Where does this gas come from?

Back

Preview of the front of card 4

Card 5

Front

What is the word for a material that won't decompose?

Back

Preview of the front of card 5
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