Only gases burn with a flame. But when you burn wood, it initially burns
with a flame. Later, it only glows without a flame. What do You think is the
reason for this?
Answers
A simple concept that :
Things require oxygen to burn .
All fuels have carbon components in them
When you burn a wood it burns because of the gases present in it which vapourises due to heat . While this burn is taking place , the atoms of carbon combines with oxygen to produce carbon dioxide .
Once all the other gases vapourise and only carbon is left , it burns slowly and produce initial flame .
Earlier what happened was there contained fuel inside the material m At last when all the fuel buel burnt only carbon dioxide what left . Since carbon dioxide molecules are heavier than air , it pushes the ligher gas "oxygen" out and itself settles down bellow to produce a glowing , initial flame . woah ! wonder of science !
This alows the wood to later glow without any flame .