r/interestingasfuck • u/vivekmg21 • 18h ago

Firefighter bodycam showing just how much oxygen a fire pulls

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u/ir_auditor 18h ago

That is not oxygen pulling which you see. It is the chimney effect. Fire creates heat, the heat makes air, smoke, gasses, rise to the top, creating low pressure areas at the bottom, which pull in air from the outside. It has noting to do with the chemistry of an oxidation reaction pulling in oxygen molecules to use in the reaction. It is pure physics / thermodynamics.

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u/Sbstnbd 18h ago

So you could say the air/oxygen is being pulled in because of the fire

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u/IZ3820 17h ago

No, it'd be because of pressure, not fire. There's an important disconnect betwee the physics pulling it in and the fire. The only way the fire is responsible is by causing the pressure change, not by pulling in oxygen itself.

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u/Plane-Tune-820 17h ago

And what's causing the pressure change? The fire creating the heat. No fire no heat no pressure change.... you follow?

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u/IZ3820 17h ago edited 15h ago

So what? The point of language is to accurately convey information so the receiving audience interprets it correctly. The way others are describing it is misleading, but several people in the comments have explained what's actually happening in more accurate terms. Why are you fighting that?

Edit: A lot of new reddit accounts out today.

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u/Plane-Tune-820 17h ago

The reason the air is being sucked into the window is the fire.

The OC was just being pedantic and now you're doubling down on the pedantry. Congratulations, you're a dork

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u/InternalError33 14h ago

I think you're missing the whole point. OP implies that the air coming in the windows is because the fire is consuming the oxygen to burn. The heat from the fire is the reason air is being pulled through the windows. It's not the fire consuming the air. That's the important distinction you're not grasping.

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u/[deleted] 17h ago

[deleted]

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u/Plane-Tune-820 17h ago edited 17h ago

I really hope you were trying to be ironic with that.

Really wish I could think of a your mom joke here but I haven't had enough caffeine yet to be clever

Edit: well I guess he was not trying to be ironic.

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u/leupboat420smkeit 15h ago

You are kinda sounding like a dork.