A useful fuel.

Mixtures of hydrogen and air can explode when they are it. But if hydrogen is mixed with the correct amount of air, it burns with a hot, clean flame. a hot, Hydrogen is a very useful fuel.

Homes and factories can be heated with the help of hydrogen. For many years, British homes and factories were supplied with town gas,

containing ৫0% hydrogen. It was made at the local gas works, by heating coke (carbon) with steam.
Although North sea gas is used now, it will out one day. Then hydrogen could well be used again.

some welding torches burn hydrogen. When hydrogen is mixed with pure oxygen, it burns with a very hot flame. hydrogen-oxygen welding torches can produce flames as hot as 4000c, hot enough to join pieces of metal together.


Hydrogen can be useful as a fuel for transport. But, at present, it is not widely used for this. There are some hydrogen powered buses and cars, but they are mostly experimental. only space rockets have made much use of hydrogen as a fuel. The Americn, Space Shuttle is hydrogen," powered space craft. Its orbiter sits on a fuel tank which has two compartments in it. one contains liquid hydrogen which the engines burn. The other contains the liquid oxygen which is needed to keep the hydrogen burning.