Oxyhydrogen

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Oxyhydrogen, especially in biology also called by its German name Knallgas, is a mixture of hydrogen and oxygen at the volume ratio 2:1. It is produced in this ratio by water electrolysis.

Oxyhydrogen reacts explosively back to water, releasing 286 kJ/mol of enthalpy. The controlled combustion as oxyhydrogen flame is used for welding. A flameless recombination to water occurs in fuel cells.

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