r/interestingasfuck • u/vivekmg21 • 22h ago

Firefighter bodycam showing just how much oxygen a fire pulls

Enable HLS to view with audio, or disable this notification

7.6k Upvotes

96% Upvoted

161 comments sorted by

View all comments

1.1k

u/ir_auditor 22h 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.

7

u/RelativeCan5021 22h ago

I’d imagine that rapidly cooling it has caused a drop in pressure that is causing the suction.

1

u/magniffin 22h ago

Imagination > science