under what conditions does a burning charcoal react faster, in air or in pure oxygen?
337957
Pure oxygen, it would just explode. Very dangerous.
153176
A rapid, persistent chemical change that releases heat and light and is accompanied by flame, especially the exothermic oxidation of a combustible substance.\nAn oxidising reaction takes place which gives off light and heat to form a flame. The burning process converts oxygen and other substances into a mixture of gases, water vapour and small solid particles which we call smoke. The gases are mostly carbon dioxide - C02 and carbon monoxide - CO.\nThe smoke particles, or soot, are mostly unburned carbon (C). If you hold a polished metal spoon above a candle flame it will become stained with soot. Smoke contains water vapour which is produced when the hydrogen from the candle wax combines with oxygen in the air.
1054854
The process of combustion, or burning, is simply combining something with oxygen very rapidly, in a reaction that releases heat. When hydrogen burns, the result is water, which is just fully oxidized hydrogen. In effect, water is the "ash" of burned hydrogen. \n\nAnd like all other forms of ash, because water is already fully oxidized, it can no longer accept oxygen, and therefore cannot burn.
530000
Charcoal adsorbs colors, ordors, etc., on its surface.  The finer the charcoal the more it will adsorb.  It is strictly a physical process with no chemical change to either the adsorbed particle or to the charcoal.  Many water plants use "activated" charcoal to help clean and deodorize the water before sending it into their communities.
772976
Combustion generally gives off CO2 and H2O vapor.
880114
flare up bigger than normal..\noxygen is not flammable..but the presence of it is needed for combustion\n\nCH4 + 2O2 --> CO2 + 2H2O\n\nwith burning in atmosphere, the flame is smaller because of incomplete burning,*there is only about 21% of oxygen in atmosphere..
940903
Well, the flame is a reaction with air at a certain temperature range. At the base, the heat radiates only a short distance. Above the wic, the heat travels upward (hot air raises), so the length of the flame follows this.
611975
Fuels are substances that burn by combining with oxygen.\n\nOxidizers are substances that generate oxygen when they take part in a chemical reaction with the fuel.\n\nSince oxygen is provided by the oxidizing agent, the reaction can take place without air. This is what happens in explosives.
641178
"Fire is the rapid combination of oxygen with fuel in the presence of heat, typically characterized by flame, a body of incandescent gas that contains and sustains the reaction and emits light and heat." \n\nLet's go through this bit by bit:\n\n(1) Rapid combination of oxygen with fuel in the presence of heat. Oxygen, fuel, and heat are the essential ingredients of fire.\n\n(2) Typically characterized by flame. The pup qualifier "typically" allows me to sidestep the issue of apparently nonflaming fires, like you get with burning charcoal. I suspect charcoal fires do create flame--you just can't see it due to the lack of impurities or incompletely burned fuel in the plume. (You can't see a fuel fire at an Indy or CART race either, because the cars run on clean-burning methanol.) But that's a matter we can leave for another day.\n\n(3) Body of incandescent gas. Flame defined. Most encyclopedia and dictionary definitions blow past this entirely, allowing persons such as yourself to imagine that fire is "pure energy" or similar nonsense. We say "body" because the gas has a characteristic structure and composition. We say "incandescent" because (a) it sounds scientific, (b) it means "luminous with intense heat," precisely what we are attempting to convey, and (c) if the Teeming Millions are going to learn one vocabulary word today, by God "incandescent" should be it.\n\n(4) Contains and sustains the reaction. Flame isn't just the result of fire; it is the fire. What's more, without the flame's heat the fire would go out.\n\n(5) Emits light and heat. Duh. However, we mustn't overlook the obvious.
1087539
When things "burn" the general reaction is as follows:\nCarbon + O2 --> CO2 + H2O\nThe CO2 and H2O are emitted as gasses, which means that the ash is everything that is left.  The composition of the ash depends on the starting material, and the black soot is most likely reduced carbon (such as graphite).
790607
Any chemical that will react with oxygen can give a color change; it just depends on how fast a color change you want.  Generally, anything that reacts quickly will also be fairly dangerous to handle.  Most plastics also have antioxidents mixed in to limit their degradation in air, which will also limit your color change.\n\nThe chemical with the fastest reaction that comes to mind is phosphorus - which will ignite in oxygen.\n\nYou could also try iron or copper, which would be a much slower reaction, but also much safer.  You can mix a weak acid (like acetic acid - vinegar) in with the plastic to accelerate the reaction. \n\nBy the way - for this to work, you will need to prepare the plastic in a nitrogen (or other non-oxygen) atmosphere.
854517
It is possible, you just have to feed so much premixed air forced down the fuel's throat that it just can't burn fast enough.\n\nA bunsen burner can do that, which is what happens when you adjust the air inlet until it gives a bright blue.\n\nIf there's any yellow in it then its not quite 100%.\n\nAlmost any normal flame is grossly underoxygenated, the smoke, the soot, the smell, the orange-yellow color, wouldn't even exist if it oxidized completely, leaving nothing but CO2 and water vapor.
304368
More rapidly than oxygen?\n\nBecause it's dissolved in the blood, and only has to move down the concentration gradient.\n\nOxygen has to bind to hemoglobin, so it takes longer for your blood to "fill up" with oxygen than it does to "empty" of CO2.
134997
I know that Gasoline and the Carbon chained fuels separate into water and thicker part after so much time of storage if exposed to air.  If you keep an inert gas in the container you will be okay.  Doesn't go "bad" per se, but just won't burn after like 5 years of free O2.
36246
Burning is rapid oxidation. What's left after something has burned, are the elements that wouldn't oxidize rapidly.
8516
The heat of the flame melts the wax. The wick will transport liquid wax into the flame zone (by capillary action), where it can evaporate. The flame consists of two different zones, an oxygen-rich outer layer where carbon monoxide burns with a transparent blue flame and an oxygen-poor inner core where soot particles give off the warm orange glow of a candle flame.\n\nChemically, you have a reaction of the wax (esters of fatty acid) with the air oxygen, forming carbon dioxide and water, and depending on the quality of the wick, soot from incomplete combustion.
570402
Nothing...unless you light a match, then...BOOM!  In the case of Oxygen and Hydrogen, you'll get pure water afterwards...that should put out the fire you just started :)\n(Not really)