1st Question: Give the reason why soot is present in the flame if the air holes are closed and absent if they are open. (the answer for this one is provided below to show a much clear context to the real question (or second question, also provided below) to be asked) Soot is generally formed as an unwanted by-product of incomplete combustion or pyrolysis. Soot generated within flames consists essentially of aggregates of spheres of carbon. Soot found in domestic fireplace chimneys contains few aggregates but may contain substantial amounts of particulate fragments of coke or char. Soot forms as a result of incomplete combustion. To achieve incomplete combustion instead of complete combustion, the fuel must burn at a lower temperature with a slightly reduced supply of oxygen. When the fuel burns, it breaks into small particles that include soot, which settles out as a dark powdery deposit. Most flames work by combining molecules with carbon (C) in them with oxygen (O2) from the air to make carbon dioxide (CO2) that's released back into the air. This is why this kind of flame produces soot - since it can't release all of the carbon as CO2, some of it gets released as the black stuff in smoke (soot). Second Question (Real Question): Support your answer in #3(the answer above) by showing the two chemical equations involved in the burning of the fuel.
1st Question: Give the reason why soot is present in the flame if the air holes are closed and absent if they are open. (the answer for this one is provided below to show a much clear context to the real question (or second question, also provided below) to be asked)
Soot is generally formed as an unwanted by-product of incomplete combustion or pyrolysis. Soot generated within flames consists essentially of aggregates of spheres of carbon. Soot found in domestic fireplace chimneys contains few aggregates but may contain substantial amounts of particulate fragments of coke or char. Soot forms as a result of incomplete combustion. To achieve incomplete combustion instead of complete combustion, the fuel must burn at a lower temperature with a slightly reduced supply of oxygen. When the fuel burns, it breaks into small particles that include soot, which settles out as a dark powdery deposit.
Most flames work by combining molecules with carbon (C) in them with oxygen (O2) from the air to make carbon dioxide (CO2) that's released back into the air. This is why this kind of flame produces soot - since it can't release all of the carbon as CO2, some of it gets released as the black stuff in smoke (soot).
Second Question (Real Question): Support your answer in #3(the answer above) by showing the two chemical equations involved in the burning of the fuel.
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