2006-08-14 06:23:35 · 7 answers · asked by mnr41 2 in Science & Mathematics ➔ Chemistry
1. Your breath is not pure Co2. There is still plenty of oxygen in your breath. That is why CPR can save people's lives. You can blow enough oxygen into someone's lungs to support life. Enough oxygen to support life means enough to support ignition.
2. When you blow into a flame, it is not only your breath that is moved. The movement of your breath also drags some surrounding air with it, contibuting to hotter flames.
3. The reason a Co2 extinguisher works is that in blows a LOT of Co2 towards the fire. The Co2 replaces the air. With no oxygen in the area, the fire goes out. Also, Co2 is heavier than air, so the gas tends to pool down, usually to the source of the flames.
2006-08-14 06:35:21 · answer #1 · answered by Vince M 7 · 0⤊ 0⤋
What is coming out of your mouth has less oxygen than the air you're breathing in, however, there is still oxygen in your exhaled breaths. That being said, what is coming from your mouth isn't the primary factor in spreading the fire, at least not the oxygen itself....instead, it's the fact that your breath is pushing other oxygen, via the air, into the fire...and the fire into more air, therefore oxygen.
2006-08-14 13:30:22 · answer #2 · answered by baldninja2004 2 · 0⤊ 0⤋
Its really good question,, when you blow Fire with your mouth your breath CO2 is not enough to surround your fire and also some air oxygen and breath oxygen still supply your fire,, and also i must remind you with what called life kiss which used to survive ppl,, we blow O2 and CO2 as our bodies never absorb all oxygen we breath
2006-08-14 15:59:15 · answer #3 · answered by source_of_love_69 3 · 0⤊ 0⤋
Carbon Dioxide extinguishes a fire by displacing oxygen. There is sufficient oxygen in the breath you exhale to keep the fire going.
2006-08-14 13:30:17 · answer #4 · answered by Norm 5 · 0⤊ 0⤋
The word you are looking for is extinguisher.
The air you breathe out when you blow is still mostly oxygen. The amount of CO2 in it is very small.
2006-08-14 13:30:09 · answer #5 · answered by Anonymous · 0⤊ 0⤋
it is because... the air we breathe in and out.. is a mixture of air..
78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, 0.03 percent carbon dioxide, and the remaining 0.07 percent is a mixture of hydrogen, water, ozone, neon, helium, krypton, xenon, and other trace components.
since we only takes in a portion of the oxygen we breathe in..
what we exhale.. does not contain 100% carbon dioxide.. therefore fire cannot be extinguished...by the mixture of air that we exhale..
2006-08-14 13:50:20 · answer #6 · answered by garfield 2 · 0⤊ 0⤋
We didn't start the fire!
2006-08-14 13:41:58 · answer #7 · answered by Mork the Stork 3 · 0⤊ 0⤋