What volume of oxygen gas (O₂)measured at 0°C and 1 atm, is needed to burn completely 1L of propane gas (C₃H₈ ), measured under the same conditions

In a balanced chemical reaction, for the combustion of propane, volume of oxygen and propane required is:

$\underset{1\mathrm{l}}{\underset{1 \mathrm{vol}}{{\mathrm{C}}_3{\mathrm{H}}_8}}+\underset{5\mathrm{l}}{5\underset{5 \mathrm{vol}}{{\mathrm{O}}_2}}⟶\underset{\underset{3 \mathrm{l}}{3 \mathrm{vol}}}{3{\mathrm{CO}}_2}+4\underset{\underset{4 \mathrm{l}}{4 \mathrm{vol}}}{{\mathrm{H}}_2\mathrm{O}}$

Hence, volume of oxygen gas measured at $0°\mathrm{C}$ and 1atm, is needed to burn completely, 1L of propane gas (C₃​H₈​), under the same conditions is 5L.