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AQA FURTHER CHEMISTRY > Getting energy from hydrogen > Flashcards

Getting energy from hydrogen Flashcards

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1
Q

What 2 ways can you use hydrogen as a fuel?

A

By burning it in an engine

Using it in a fuel cell

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2
Q

What do hydrogen and oxygen give out when the react?

A

Energy

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3
Q

What does hydrogen and oxygen produce when they react?

A

Water

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4
Q

What is the reaction between hydrogen and oxygen?

A

Exothermic

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5
Q

What does exothermic mean?

A

Releases energy

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6
Q

What can be done to hydrogen gas for it to power vehicles?

A

Burnt

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7
Q

What can hydrogen gas be burnt in?

A

Oxygen

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8
Q

What are the positive sides of hydrogen gas?

A

Combines with oxygen in the air to form just water

It is very clean

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9
Q

What is the hydrogen formula?

A

Hydrogen + oxygen = water

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10
Q

What is the negative sides of hydrogen gas?

A

Need a special, expensive engine

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11
Q

What can hydrogen and oxygen used as?

A

A fuel in the combustion engines of vehicles

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12
Q

What do fuel cells use to produce electrical energy?

A

Fuel and oxygen

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13
Q

What do fuel cells produce?

A

Electrical energy

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14
Q

What is a fuel cell?

A

An electrical cell

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15
Q

What is a fuel cell supplied with?

A

A fuel and oxygen

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16
Q

What does a fuel cell use?

A

Energy from the reaction to generate electricity

17
Q

What can hydrogen be used in?

A

A hydrogen-oxygen fuel cell

18
Q

When were fuel cells developed?

A

1960s

19
Q

Why were fuel cells developed?

A

As part of the space programme

To provide electrical power on spacecraft

20
Q

Why were fuel cells used?

A

More practical than solar cells

Safer than nuclear power

21
Q

What do fuel cells not do?

A

Run out or need recharching

22
Q

What is the car industry developing?

A

Fuel cells

23
Q

Why is the car industry developing fuel cells?

A

To replace conventional petrol/diesel engines

24
Q

What do fuel cell vehicles not produce?

A 
Conventional pollutants
Greenhouse gases 
Nitrogen oxides
Sulphur dioxide
Carbon monoxide
25
Q

What products do fuel cell vehicles produce?

A

Water and heat

26
Q

What could fuel cells help countries depend less on?

A

Crude oil

27
Q

What is hydrogen?

A

A gas

28
Q

What does hydrogen take up?

A

Space to store liquid fuels like petrol

29
Q

Why is hydrogen difficult to store safely?

A

Explosive

30
Q

How is hydrogen made?

A

From hydrocarbons

Electrolysis of water

AQA FURTHER CHEMISTRY (20 decks)

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