carbon compounds 2a int 2 1234 567 89 10 111213 14 15 22 23242526 161718192021
TRANSCRIPT
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Carbon Compounds 2a Int 2
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What is a fuel?
A substance which is burned to produce energy.
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Give another word for burning?
Combustion
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When a substance burns what is it reacting with?
Oxygen
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Name the type of compound found in oil and natural gas.
Hydrocarbons
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What is a hydrocarbon?
A compound which
contains hydrogen and carbon only.
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Name the two products formed when a hydrocarbon burns in a plentiful
supply of oxygen(complete combustion)
Carbon dioxide and water
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What is the test for carbon dioxide?
Limewater turns milky
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Name the poisonous gas produced when a hydrocarbon burns in a
limited supply of oxygen (incomplete combustion).
Carbon monoxide
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What is produced when nitrogen and oxygen from the air react inside a
petrol engine?
Oxides of nitrogen which are poisonous
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What causes nitrogen and oxygen from the air to react inside a petrol
car engine?
Spark
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Why is it dangerous to burn fuels containing sulphur compounds?
Sulphur dioxide is produced
(a poisonous gas)
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Name the harmful particles produced by the incomplete
combustion of diesel.
Soot
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What does a catalytic converter do?
Converts pollutant gases into
harmless gases.
Carbon monoxide into carbon dioxide
Oxides of nitrogen into nitrogen
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Name the type of chemicals compounds found in crude oil.
Hydrocarbons
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Name the process used to separate crude oil into fractions.
Fractional distillation
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What is a fraction?
A mixture of hydrocarbons with similar boiling points
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What property allows the hydrocarbons to be separated by
fractional distillation?
They have different boiling points
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Which size of hydrocarbon molecules have the largest
boiling point?
largest molecules - as the molecules become
larger the boiling point increases.
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Describe what happens to ease of evaporation, viscosity and
flammability as the molecular size increases.
As the molecular size increases
- ease of evaporation decreases
- more viscous(thicker)
- less flammable
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Why is lubricating oil more viscous than petrol?
Lubricating oil contains longer hydrocarbons than petrol.
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Is air a mixture of gases or a compound?
A mixture of gases
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Name the gas which turns lime water milky?
Carbon dioxide
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What is the test for oxygen gas?
Relights a glowing splint
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Why should sulphur dioxide not be released into the atmosphere?
It causes acid rain
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Give a use for the residue fraction.
Tar for roads/roofing
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Approximately how many carbon atoms are in the hydrocarbon
molecules used to make petrel?
8 carbons
C8H18
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Carbon Compounds 2a Int 2
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