2006-10-27 11:59:10 · 6 answers · asked by yoyo 2 in Science & Mathematics ➔ Chemistry
Because dry ice is Carbon Dioxide. A flame needs pure Oxygen to burn.
2006-10-27 12:01:14 · answer #1 · answered by Anonymous · 1⤊ 2⤋
A flame needs at least 15% oxygen concentration in the air to burn properly ut usually burns at 20-21%. Let says it's in a 1 liter container and you put .5 cubic liters of co2 (carbon dioxide) in the container. It will fall to the bottom because o2 with a carbon molecule attached is heavier than just o2. So it will push the oxygen to the top and during the process, the two gases will mix causing the oxygen concentration to go down to 10-15% which is why you see the flame get smalller until it goes out. (regular air has 20-21% oxygen)
2006-10-27 19:08:16 · answer #2 · answered by akitashencp 2 · 0⤊ 0⤋
Dry ice is carbon dioxide, which does not react in a combustion (CO2 is actually the result of the combustion of carbon), that gas would then dispace some air, reducing the oxygen supply that is needed to keep the flame burning, hence the flame will reduce in intensity.
2006-10-27 19:04:45 · answer #3 · answered by Vincent G 7 · 0⤊ 0⤋
This is because dry ice is carbon dioxide (CO2) in the solid phase, and CO2 displaces oxygen (O2) that is needed for combustion. In fact, CO2 is often used in fire extinguishers.
2006-10-27 19:02:33 · answer #4 · answered by Dub 2 · 0⤊ 0⤋
Loss of oxygen caused by the sublimation of the Dry Ice into carbon dioxide. Air ( primarily Nitrogen) is one of three ingredients of fire.
2006-10-27 19:05:07 · answer #5 · answered by Doubting Thomas 4 · 0⤊ 1⤋
Because the "gas" is the evaporated dry ice, which is carbon dioxide.
CO2 is often used in fire extinguishers to put out fires.
2006-10-27 19:03:21 · answer #6 · answered by arbiter007 6 · 0⤊ 1⤋