Harry Kroto 2004 Candle Flame.

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Presentation transcript:

Harry Kroto 2004 Candle Flame.

yj-education.com Bunsen Burner

Harry Kroto 2004 at: commons.wikimedia.org/wiki/File:Bunsen_burner...commons.wikimedia.org/wiki/File:Bunsen_burner...

Harry Kroto 2004

In zero gravity, convection does not carry the hot combustion products away from the fuel source, resulting in a spherical flame front.zero gravity at: chemistry.about.com/.../f/firegravity.htm chemistry.about.com/.../f/firegravity.htm

Harry Kroto 2004 Different flame types of a Bunsen burner depend on oxygen supply. On the left a rich fuel mixture with no premixed oxygen produces a yellow sooty diffusion flame and on the right a lean fully oxygen premixed flame produces no soot and the flame color is produced by molecular radical band emission.band emission

Harry Kroto 2004 Sodium Flame Test

LineCaused by..Wavelength (Å) LineCaused by..Wavelength (Å) AO2O dFe4668 BO2O eFe4384 CH6563fH4340 aO2O GFe & Ca4308 D - 1, 2Na5896 & 5890gCa4227 EFe5270hH4102 b - 1, 2Mg5184 & 5173HCa3968 cFe4958KCa3934 FH4861 at: web.me.com/dtrapp/ePhysics.f/labII_9.htmlweb.me.com/dtrapp/ePhysics.f/labII_9.html

Harry Kroto 2004 NaCl