Getting energy from hydrogen Flashcards
(30 cards)
What 2 ways can you use hydrogen as a fuel?
By burning it in an engine
Using it in a fuel cell
What do hydrogen and oxygen give out when the react?
Energy
What does hydrogen and oxygen produce when they react?
Water
What is the reaction between hydrogen and oxygen?
Exothermic
What does exothermic mean?
Releases energy
What can be done to hydrogen gas for it to power vehicles?
Burnt
What can hydrogen gas be burnt in?
Oxygen
What are the positive sides of hydrogen gas?
Combines with oxygen in the air to form just water
It is very clean
What is the hydrogen formula?
Hydrogen + oxygen = water
What is the negative sides of hydrogen gas?
Need a special, expensive engine
What can hydrogen and oxygen used as?
A fuel in the combustion engines of vehicles
What do fuel cells use to produce electrical energy?
Fuel and oxygen
What do fuel cells produce?
Electrical energy
What is a fuel cell?
An electrical cell
What is a fuel cell supplied with?
A fuel and oxygen
What does a fuel cell use?
Energy from the reaction to generate electricity
What can hydrogen be used in?
A hydrogen-oxygen fuel cell
When were fuel cells developed?
1960s
Why were fuel cells developed?
As part of the space programme
To provide electrical power on spacecraft
Why were fuel cells used?
More practical than solar cells
Safer than nuclear power
What do fuel cells not do?
Run out or need recharching
What is the car industry developing?
Fuel cells
Why is the car industry developing fuel cells?
To replace conventional petrol/diesel engines
What do fuel cell vehicles not produce?
Conventional pollutants Greenhouse gases Nitrogen oxides Sulphur dioxide Carbon monoxide
