Chemistry C3 3.5 Fuel issues.

What does much of the world rely on for energy?
Fossil fuels.
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What are the disadvantages of fossil fuels?
They are non-renewable and they cause pollution.
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Why is there an urgent need to develop alternative fuels?
Fossil fuels are non-renewable and cause pollution.
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What is hydrogen used for?
Hydrogen is an alternative fuel, it can be burned in combustion engines or used in fuel cells to power vehicles.
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What advantages of using hydrogen as a fuel?
It burns easily and releases a large amount of energy per gram, it produces no carbon dioxide when it is burned (only water) and it can be produced from renewable sources.
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What are the disadvantages of using hydrogen as a fuel?
Supply, storage and safety problems.
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What do vehicles that use fuel cells need to be feasible?
They need to match the performance, convenience and costs of petrol and diesel vehicles.
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Why are cars fuelled with hydrogen being developed?
Fossil fuels: non-renewable/limited resource, cause pollution, release carbon dioxide, cause global warming. Hydrogen: produces only water and no carbon dioxide or pollutants, releases a large amount of energy per g, can be made from renewable sources.
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Other cards in this set

Card 2

Front

What are the disadvantages of fossil fuels?

Back

They are non-renewable and they cause pollution.

Card 3

Front

Why is there an urgent need to develop alternative fuels?

Back

Preview of the front of card 3

Card 4

Front

What is hydrogen used for?

Back

Preview of the front of card 4

Card 5

Front

What advantages of using hydrogen as a fuel?

Back

Preview of the front of card 5
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