Assuming that petrol is octane (C8H18) and has density 0. 8 g/ml, 1.425 litre of petrol on complete combustion will consume

Question

Assuming that petrol is octane (C8H18) and has density 0. 8 g/ml, 1.425 litre of petrol on complete combustion will consume (A) 50 mole of O2 (B) 125 mole of O2 (C) 100 mole of O2 (D) 200 mole of O2

Tardigrade Admin · Accepted Answer

Mass of octane = 1.425 × 103 × 0.8 g Moles of octane = (1425× .8/114) = 10 moles C8H18 + (25/2) O2 → 8CO2 + 9H2O From the equation it can be seen For 1 mole octane oxygen required (25/2) moles ∴ for 1 moles octane oxygen required (25/2) × 10 = 125 moles

Q. Assuming that petrol is octane $(C_{8} H_{18})$ and has density $0.8 g / m l, 1.425$ litre of petrol on complete combustion will consume

$50$ mole of $O_{2}$

$125$ mole of $O_{2}$

$100$ mole of $O_{2}$

$200$ mole of $O_{2}$

Q. Assuming that petrol is octane (C8​H18​) and has density 0.8g/ml,1.425 litre of petrol on complete combustion will consume

50 mole of O2​

125 mole of O2​

100 mole of O2​

200 mole of O2​

Mass of octane =1.425×103×0.8g Moles of octane =1141425×.8​=10 moles C8​H18​+225​O2​→8CO2​+9H2​O From the equation it can be seen For 1 mole octane oxygen required 225​ moles ∴ for 1 moles octane oxygen required 225​×10=125 moles

Q. Assuming that petrol is octane $(C_{8} H_{18})$ and has density $0.8 g / m l, 1.425$ litre of petrol on complete combustion will consume

$50$ mole of $O_{2}$

$125$ mole of $O_{2}$

$100$ mole of $O_{2}$

$200$ mole of $O_{2}$