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In laboratory conditions it is possible to achieve colorless fire that can only be determined by the fluctuation of air in combustion. Home fire always "color". The color of the fire is determined mainly by the temperature of the flame and what chemicals it burn. High flame temperature allows the atoms to jump at some time in the higher energy state. When the atoms return to their original state, they emit light with a specific wavelength. It corresponds to the structure of the electron shells of the given element.

The famous blue light, which can be seen when burning natural gas, due to carbon monoxide, which gives this shade. Carbon monoxide, which molecule consists of one oxygen atom and one carbon atom, is a byproduct of burning natural gas.

Try to sprinkle on the burner of the gas stove a little povarennykh salt in the flame appears yellow tabs. This yellow-orange flame give sodium (as sodium chloride, recall is sodium chloride). Such salts are rich in wood, so an ordinary forest fire or domestic matches are burning with a yellow flame.

Copper gives the flame a green tint. At high copper content in combustible substance, the light has a bright green color, almost identical to the white.

Green color and its shades the fire also give barium, molybdenum, phosphorus, antimony. In blue colors the flame selenium, and blue-green - Bor. Red flame will give lithium, strontium and calcium, purple - potassium, yellow-orange tint released during the combustion of sodium.

Flame color:

The flame temperature during combustion of certain substances:

Match 750-1200°C The flame of the candle
Natural gas 400-800°C
Alcohol 900°C
Kerosene 1100°C
Gasoline 1300-1400°C
Magnesium 2200°C

And do you know...

Due to the property of atoms and molecules to emit light of a certain color method was developed for determining the composition of substances, which is called spectral analysis. Scientists are exploring the range, which emits a substance, for example, by burning, compare it with the spectra of known elements, and, thus, determine its composition.

See also:
What is the fire?


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2012-04-09 01:56:47
it is now clear and I noticed that the color of the flame is different but not thought
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