Question

What is the method used to decompose water?​

Answer 1

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Electrolysis of water is the process of using electricity to decompose water into oxygen and hydrogen gas.

Hydrogen gas released in this way can be used as hydrogen fuel, or remixed with the oxygen to create oxyhydrogen gas, which is used in welding and other applications.

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Answer 2

Answer:

water electrolysis

Splitting water into its two components is much easier to do and is called water electrolysis. Making hydrogen or oxygen this way seems simple. But as you probably suspected, this reverse reaction needs an energy input, which is why it is also called an endothermic reaction.