how hydrogen works as a fuel.
In: Technology
Remember the Hindenburg?
Hydrogen burns quite well when mixed with oxygen and gives off a fair bit of energy while doing that. Rockets take liquid hydrogen and liquid oxygen and burn them in a big chamber and squirt the hot gasses out the back to get thrust. Some hydrogen powered cars use modified engines to burn hydrogen with air instead of gasoline.
Another option is to use a fuel cell which takes hydrogen and mixes it with oxygen to create water and directly captures electrical energy from the reaction rather than capturing the heat as thrust(rocket) or pressure(car engine), this is more efficient but requires fancier equipment.
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