question for support combustion nitrogen gas

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Offline taregg

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question for support combustion nitrogen gas
« on: 22/01/2015 12:26:32 »
is it true that nitrogen gas can only support combustion in very high combustion temperature....and why
« Last Edit: 22/01/2015 12:30:27 by taregg »

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Offline chiralSPO

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Re: question for support combustion nitrogen gas
« Reply #1 on: 22/01/2015 14:02:45 »
The triple bond in N2 is very strong (945 KJ/mol vs O2 with a meager 497 kJ/mol), so it requires a lot of energy to break. Oxygen is also more reactive than expected from its bond dissociation energy because of its unique electronic structure. The most stable form of O2 is paramagnetic, with two unpaired electrons in a half-occupied doubly degenerate orbital, so oxygen can start stealing electrons before its own bond breaks. When excited properly, the two electrons can be forced to pair up, forming singlet oxygen, which is even more reactive.

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Offline taregg

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Re: question for support combustion nitrogen gas
« Reply #2 on: 22/01/2015 16:56:14 »
can we use cylinder nitrogen instead cylinder oxygen with ethtelen in welding

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Offline chiralSPO

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Re: question for support combustion nitrogen gas
« Reply #3 on: 22/01/2015 17:38:47 »
no, I don't think so.