Fuel, Combustion and Flame Class 8 Science

CBSE Class 8 Science Flame

Flame – Everything that burns does not produce a flame, substances which vaporize will only produce a flame, wax is a hydrocarbon.

When we light candle with a matchstick, the heat of the burning matchstick melts wax first, then it changes it into wax vapour. The wax vapour mix with air and then catch fire to produce a flame. Wax vapour combines with oxygen producing heat and light. As a result of this oxidation, carbon changes into carbon dioxide. Candle flame is always in a spindle shape. During combustion of hydrocarbon it may burn incompletely. This form soots carbon. There are four types of zone