The combustion of octane, C8H18, proceeds according to the reaction shown.
2C8H18(l)+25O2(g)⟶16CO2(g)+18H2O(l)
If 378 mol of octane combusts, what volume of carbon dioxide is produced at 13.0 ∘C and 0.995 atm?
From the balanced equation we can say that
2 mole of octane produces 16 mole of CO2 so
378 mole of octane will produce
= 378 mole of octane *(16 mole of CO2 / 2 mole of octane)
= 3024 mole of CO2
Therefore, the number of moles of CO2 = 3024 mole
PV = nRT
where, P = pressure = 0.995 atm
V = volume = ?
n = number of moles = 3024 mole
R = Gas constant
T = temperature = 13.0 + 273 = 286 K
0.995 * V = 3024 * 0.0821 * 286
0.995 * V = 71005
V = 71005 / 0.995 = 71362 L
Therefore, the volume of CO2 produced would be 71362 L
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