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2007-11-21 05:03:01 · 6 answers · asked by Anonymous in Science & Mathematics Chemistry

6 answers

It depends on what you are burning. It is generally the substance being burned plus oxygen.

In a campfire, on the most elementary level you are burning carbon compounds. (Other elements are present, but this will do.) When something burns, it is combining with oxygen from the atmosphere. This reaction gives off heat, and quite a bit of it. This heat excites the atoms, causing them to glow. This glow is what we see as "fire." In the campfire example, you get mostly carbon dioxide and water vapor.

If the burning was complete, the flames would appear blue in color (like the flame from a gas stove). However, it isn't complete; some material only partially burns, resulting in the much brighter oranges and yellows.

Other substances burn also, so there is no universal answer that applies to ALL fires. As I said at the beginning, it depends on what you are burning.

2007-11-21 05:18:32 · answer #1 · answered by phoenixshade 5 · 3 0

Fire is not made of elements. Fire is the reaction caused by increasing the ambient temperature of an element to its point of ignition. BUT, for this reaction to occur, it must be in the presence of Oxygen, as well as have an available source of fuel...such as paper, wood or petroleum.
Also, by ignighting these items, the molecules of these items are changed and broken down into their based elements.

2007-11-21 05:15:42 · answer #2 · answered by Anonymous · 0 0

any element that can burn like hydrogen carbon etc and
oxygen to support combustion makes up fire

2007-11-21 05:12:35 · answer #3 · answered by puneeth cva 2 · 1 0

The actual "fire" that one sees is incandescing carbon atoms. Unburned carbon atoms have their electrons blown away by the heat. As the electrons descend back to the atoms, the energy is emitted again as yellow light.

2007-11-21 05:15:26 · answer #4 · answered by steve_geo1 7 · 1 0

fuel
heat
oxygen
chemical chain reaction

2007-11-21 05:16:38 · answer #5 · answered by jhulia g 4 · 1 0

carbon atoms

2007-11-21 05:33:01 · answer #6 · answered by Anonymous · 0 0

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