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combustion and flame

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  • December 12, 2022
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  • 2022/2023
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  • Secondary school
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A chemical process in which a substance reacts with oxygen to give heat and light is called combustion .


The light which is given off during combustion can be in the form of flame or as glow.




magnesium+o2=magnesium oxide +heat+light
It is a combustion process.




(charcoal is mainly carbon)
co2+o2=co2+heat+light
Since coal burns in air to produce carbon dioxide, heat and light. Thus, charcoal and coal are combustible
substances.(respiration is a kind of combustion.)




Air is necessary for combustion.
Presence of combustible substances.
In the sun heat and light are produced by nuclear reaction.




The lowest temperature at which a substance starts burning is called its ignition temperature.

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