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What are biofuels made of?
Made from plant or animal products and are renewable.
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What are biodiesel made off?
Vegetable oils extracted from plants.
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How is ethanol made?
Sugar beet and sugar cane
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What are plastics made of?
Polymers
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What are polymers made of?
monomers
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Name 3 uses of polymers?
Packaging, clothing, medical applications
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Why do we use polymer materials for dental use?
Because old fillings had mercury in it.
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Why do we use polymer s to coat fabrics?
They are waterproof and breathable.
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Why do we recycle plastic?
Because they are made in to polyester fibres that are then used for clothing and pillow fillings!
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Many Polymers are not biodegradable. What does this mean?
does not brake down when left in the environment.
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How do we make polymers biodegradable?
By adding cornstarch.
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How is ethanol produced?
From the fermentation of sugar from plants using yeast. Also by hydrogen of ethene.
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What is a catalyst?
The rate of a reaction can be increased by adding a suitable catalyst. A catalyst is a substance which changes the rate of reaction but is unchanged at the end of the reaction.
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What is cracking?
When large hydrocarbon molecules can be broken down into smaller molecules.
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How is cracking done?
1)By heating a mixture of hydrocarbons vapours and steam to a very high temp! 2) by passing hydrocarbon vapours over a hot catalyst.
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What are alkanes?
They are saturated hydrocarbons!
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What is the general formula for alkanes?
CnH2n+2
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What happens during cracking?
Thermal decomposition reactions produce a mixture of smaller molecules.
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What are alkenes?
Saturated hydrocarbons.
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What's the general formula for alkenes?
CnH2n
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Alkenes have a...........between two carbon atoms.
double bond.
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Why are resources limited in this world?
Because they only come from the crust sea and atmosphere.
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Where did most of the carbon dioxide go in the early atmosphere?
Sedimentary rocks.
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Where does carbon dioxide dissolve?
Oceans
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How are compounds formed?
When 2 or more elements react together.
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How do atoms of elements join together?
by sharing or by transferring electrons to achieve stable electronic structure.
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Other cards in this set

Card 2

Front

What are biodiesel made off?

Back

Vegetable oils extracted from plants.

Card 3

Front

How is ethanol made?

Back

Preview of the front of card 3

Card 4

Front

What are plastics made of?

Back

Preview of the front of card 4

Card 5

Front

What are polymers made of?

Back

Preview of the front of card 5
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