How much air is required for combustion?
Answers
Answer:
Therefore the quantity of oxygen required for combustion of 1 kg of the fuel is: (2.66C + 8H + S) kg. ∴ Oxygen required from air for the complete combustion of fuel will be (2.66C + 8H + S – O) which can be written as 2.66C + 8 (H – O/8) + S, the term in the bracket being known as the available hydrogen
Aim:
To show that oxygen (air) is necessary for combustion.
Materials Required:
Two candles, a match box and a glass jar. Theory Combustion is a chemical reaction in which a combustible substance burns in air (oxygen) to produce Carbon dioxide , water and heat.
Combustible substance (Fuel) + 0,— CO, + Water + Heat
Procedure:
(i) Light two candles and fix them on the table.
(ii) Cover one of the candles by an inverted glass jar.
Observations:
Candle covered by glass jar extinguishes due to the absence of air while the other candle keeps on burning because it is getting regular supply of oxygen (air). Conclusion Oxygen (air) is necessary for the combustion process.