Oxyhydrogen - Wikipedia, the free encyclopedia. For bacteria which oxidize hydrogen, see Knallgas- bacteria. Oxyhydrogen is a mixture of hydrogen (H2) and oxygen (O2) gases. This gaseous mixture is used for torches to process refractory materials and was the first. Theoretically, a ratio of 2: 1 hydrogen: oxygen is enough to achieve maximum efficiency; in practice a ratio 4: 1 or 5: 1 is needed to avoid an oxidizing flame. For the stoichiometric mixture, 2: 1 hydrogen: oxygen, at normal atmospheric pressure, autoignition occurs at about 5. The amount of heat energy released is independent of the mode of combustion, but the temperature of the flame varies.
The energy required to generate the oxyhydrogen always exceeds the energy released by combusting it, even at maximum efficiency. The input energy of a closed system will always equal the output energy, as the first law of thermodynamics states. It produced a flame hot enough to melt such refractory materials as platinum, porcelain, fire brick, and corundum, and was a valuable tool in several fields of science. It is used for cutting and welding. It is named after Yull Brown, who claimed that it could be used as a fuel for the internal combustion engine. The most common and decisive counter- argument against producing this gas on board to use as a fuel or fuel additive is that more energy is needed to split water molecules than is recouped by burning the resulting gas.
Managing Information Technology Brown 7th Edition. 14-09-2016 2/2 Managing Information Technology Brown 7th Edition. Other Files Available to Download New evidence; Myth-Conceptions. When BG is used as a torch fuel-gas, it can weld virtually any.

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