Combustion and Flame
Requirements for Combustion
Fuel
Oxygen
Ignition Temperature
Solids (wood, coal)
Liquids (kerosene, petrol)
Gases (natural gas)
Supports combustion
Result of comburstion
Heat (Released during combustion)
Light (Often produced during combustion)
Types of Combustion
Rapid Combustion (e.g., burning wood)
Slow Combustion (e.g., rusting of iron)
Spontaneous Comburstion(e.g.,forest fires, yellow phosphorus)
Explosion(e.g., fire crackers)
Flame
Structure of a Candle Flame
Outermost non-luminous zone
MIddle luminous zone
Dark inner zone
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Lowest blue zone
Calorific Value
Amount of heat produced per 1 kg fo fuel
SI unit = joule per kelogram(J/kg)