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10 May, 23:18

A pile of leaves is lit on fire, and then covered completely with a fire blanket so that the fire goes out. Identify the limiting reactant in this situation.

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  1. 10 May, 23:38
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    The limiting reactant in this question is oxygen, O₂.

    Explanation:

    The equation for fire is

    Fuel + O₂ → CO₂ + H₂O

    In the above equation and from the question we have

    Fuel = Pile of leaves

    O₂ = Oxygen in the air

    When the pile of leaves is lit on fire and the fire is then covered with a fire blanket put out the fire, the blanket limits access of the fire to atmospheric oxygen which limits the amount of oxygen present which therefore limits the amount of CO₂ and H₂O that can be produced.

    Hence the covering of the fire by the blanket limits the quantity of oxygen which limits the reaction. Hence oxygen is the limiting reactant.
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