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This high flame temperature is partially due to the absence of hydrogen in the fuel (dicyanoacetylene is not a hydrocarbon) thus there is no water among the combustion products. Cyanogen, with the formula (CN) 2, produces the second-hottest-known natural flame with a temperature of over 4,525 °C (8,177 °F) when it burns in oxygen. [11] [12]
Colored fire is a common pyrotechnic effect used in stage productions, fireworks and by fire performers the world over. Generally, the color of a flame may be red, orange, blue, yellow, or white, and is dominated by blackbody radiation from soot and steam.
A typical temperature increase upon ignition of a cool flame is a few tens of degrees Celsius whereas it is on the order of 1,000 °C (1,830 °F) for a hot flame. [2] [13] Most experimental data can be explained by the model which considers cool flame just as a slow chemical reaction where the rate of heat generation is higher than the heat loss.
The color of a neutral flame is semi-transparent purple or blue. [1] This flame is optimal for many uses because it does not oxidize or deposit soot onto surfaces. Bunsen burner flames with different oxygen levels: 1. diffusion flame, 2. reducing flame, 3. fuel-rich neutral flame, 4. neutral flame
The closest will be the hottest part of a flame, where the combustion reaction is most efficient. This also assumes complete combustion (e.g. perfectly balanced, non-smoky, usually bluish flame). Several values in the table significantly disagree with the literature [ 1 ] or predictions by online calculators.
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The red lithium flame leads to lithium's use in flares and pyrotechnics Copper compounds glow green or blue-green in a flame. Calcium compounds glow orange in a flame. Sodium compounds glow yellow in a flame. A pyrotechnic colorant is a chemical compound which causes a flame to burn with a particular color.