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Chemistry

Calculate the volume of oxygen at STP required for the complete combustion of 100 litres of carbon monoxide at the same temperature and pressure.

2CO + O2 ⟶ 2CO2

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Answer

From equation:

2CO+O22CO22 vol.:1 vol.2 vol.\begin{matrix} 2\text{CO} & + & \text{O}2 & \longrightarrow & 2 \text{CO}2 \\ 2 \text{ vol.} & : & 1 \text{ vol.} & \longrightarrow & 2\text{ vol.} \end{matrix}

[By Gay Lussac's law]

2 V of CO requires = 1V of O2

∴ 100 litres of CO requires = 12\dfrac{1}{2} x 100 = 50 litres.

Hence, required volume of oxygen is 50 litres.

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