How does atomic hydrogen or oxy-hydrogen toch function for cutting and welding purposes? Explain.

How does atomic hydrogen or oxy-hydrogen toch function for cutting and

1.	How does atomic hydrogen or oxy-hydrogen toch function for cutting and welding purposes? Explain.
Answer» Solution :When MOLECULAR hudrogen is passed through tungsten electric arc `(2000-3000^(@)C)`, at low pressure, it dissociates to form ATOMS of hydrogen, known as atomic hydrogen. `underset("Molecular hydrogen")(H_(2)) overset("Electic arc")to underset("Atomic hydrogen")(2H), DeltaH=435.9kJ mol^(-1)` Atomic hydrogen is extremely unstable (life period is about 0.3sec). THEREFORE atoms immddiately unite to form molecular hydrogen again accompained by the liberation of a large amount of heat energy. The temperature rises to `4000-5000^(@)C`. This is HTE principle of atomic hydrogen torch which is USED for welding purposes. Oxy hydrogen torch. When hydrogen is burnt in oxygen, the reaction is highly exothermic in nature. A temperature ranging between `2800^(@)C "to" 4000^(@)C` is generated. This temperature can be employed for weldin purpose in the form of oxy hydrogen torch.