A finite, unrenewable resource that is being made very slowly
1 of 15
Why does bitumen exit at the bottom of the fractionating column?
Bitumen has strong intermolecular forces which need to be broken during boiling. Therefore more energy is needed (more heat at the bottom of the column) leaving bitumen at the bottom of the column.
2 of 15
What problems could occur when transporting crude oil? And how can it be resolved?
There is a risk of oil slicks which would damage birds' feather. Detergent is used to clean up the oil.
3 of 15
What does cracking do? And to which molecules?
Cracking is when large alkane molecules are heated to make smaller alkene molecules. Used to keep up with supply and demand.
4 of 15
What are the concerns about population and fossil fuel burning increasing?
There will be an increase in carbon dioxide levels and gas emissions
5 of 15
What happens during complete combustion?
Plenty of oxygen is used to react with the hydrocarbon, this gives of lots of energy, carbon and water.
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What happenes during incomplete combustion?
Not enough oxygen is supplied resulting in less energy, carbon monoxide and water.
7 of 15
What percentage of oxygen and nitrogen is in the air?
21% oxygen and 78% nitrogen.
8 of 15
Why has the percentage of carbon dioxide in the air slightly increased?
Deforestation means less photosynthesis/increased population means more burning of fossil fuels.
9 of 15
Give a definition of degassing.
The process in which gases come from the center of the Earth through volcanoes
10 of 15
Describe the theory of how the Earth's atmosphere first began.
The atmosphere was originally water vapor and carbon dioxide which then condensed to make the oceans. The percentage of nitrogen increased because it is unreactive.
11 of 15
What happens in a catalytic converter?
Carbon monoxide from cars get changed into carbon dioxide on the surface.
12 of 15
Explain fully what happens in the reaction between bromine and hydrocarbons.
Bromine turns colourless in the presence of alkenes but stays orange if alkenes are not present. This is because the double bond in alken can react with the bromine.
13 of 15
What is a saturated molecule?
Single bonds only hydrocarbon.
14 of 15
Explain what happens during additional polymerisation.
Alkene monomers react under high pressure and a catalyst to become polymers. Unsaturated monomers become saturated polymers.
15 of 15
Other cards in this set
Card 2
Front
Why does bitumen exit at the bottom of the fractionating column?
Back
Bitumen has strong intermolecular forces which need to be broken during boiling. Therefore more energy is needed (more heat at the bottom of the column) leaving bitumen at the bottom of the column.
Card 3
Front
What problems could occur when transporting crude oil? And how can it be resolved?
Back
Card 4
Front
What does cracking do? And to which molecules?
Back
Card 5
Front
What are the concerns about population and fossil fuel burning increasing?
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