Chemistry - Hydrocarbons

What are hydrocarbons made from?
Contains only hydrogen and carbon (don't forget ONLY in exam!)
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What do properties of the hydrocarbon depend on?
Size of molecule
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You can either have long or short ___ of hydrocarbons
Chains
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Longer chains have more __
carbon
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Longer chains have a ___ boiling point then smaller chains
Higher
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__ chains are more volatile (easier to evaporate)
shorter/smaller
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___ chains are more viscous (flows easily - e.g hard substance will be less viscous)
Longer/bigger
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Short chains are ___ to ignite
easy (clean flame) - More flammable
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Longer chains are harder to ignite (less flammable) and produce more ___ (incomplete combustion)
smoke
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Which hydrocarbons are better for fuel?
smaller/lighhter
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The hydrogen and carbon in fuel have been o_____ completely (complete combustion)
oxidized
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This reaction is good for fuel because it is __othermic
exothermic - produces lots of energy
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Products of complete combustion reaction with hydrocarbons are only __ and __
Carbon dioxide and water
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Incomplete combustion occurs when they're a lack of __
Oxygen/air
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An incomplete combustion reaction with hydrocarbons and water would produce carbon dioxide, water, ___ and ___
carbon monoxide and carbon (soot)
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___ energy is produced in this reaction
less
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carbon monoxide is _____less and ____less
colourless and odourless
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Why is it dangerous?
Replaces Oxygen in red blood cells, reducing overall amount of oxygen, making us sleepy/unconscious or even lead to death
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Why is soot dangerous?
Blocks exhaust pipes, damage engine or boiler, can blacken buildings, get in lungs (breathing problems)
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Other cards in this set

Card 2

Front

What do properties of the hydrocarbon depend on?

Back

Size of molecule

Card 3

Front

You can either have long or short ___ of hydrocarbons

Back

Preview of the front of card 3

Card 4

Front

Longer chains have more __

Back

Preview of the front of card 4

Card 5

Front

Longer chains have a ___ boiling point then smaller chains

Back

Preview of the front of card 5
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