As the candle burns, it gets The wick then absorbs the liquid wax and evaporates it. The candle is lit by the burning wax vapor. The liquid wax is turned into a heated gas by the flame's heat, which also begins to decompose the hydrocarbons into molecules of hydrogen and carbon.
These vaporized molecules are attracted to the flame, where they combine with airborne oxygen to produce heat, light, water vapor (H2O), and carbon dioxide (CO2).
In addition to heating the wax as it burns, a candle flame also heats the air around it. Cool air rushes to replace the hot air as it rises toward the flame. Convection current, which gives the candle flame its shape, is a continuous cycle of heat rising to the top and cool air rushing to the bottom.
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