even though the air is a bad conductor of heat.. why do we still need air for combustion?
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Why is air a poor conductor of heat?
It is mainly the very low density of gases that make them bad conductors of heat. In liquids and solids atoms and molecules are densely packed and transfer of energy has much smaller distances to happen.
why do we still need air for combustion?
There must be enough air in the combustion chamber for complete combustion to occur. The addition of excess air greatly lowers the formation of CO (carbon monoxide) by allowing CO to react with O2. The less CO remaining in the flue gas, the closer to complete combustion the reaction becomes.
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