Question

How much quantity of CO2 reaches atmosphere, when 1 kg methane is burnt ?

• A. 3.03 kg
• B. 3.50 kg
• C. 1.25 kg
• D. 2.75 kg

Answer 1

Answer:

D. 2.75 kg

• When $1\text{ kg}$ of methane ($\text{CH}_4$) undergoes complete combustion, it releases 2.75 kg (or 2.743 kg) of carbon dioxide ($\text{CO}_2$) into the atmosphere.

• Molar Mass of Methane ($\text{CH}_4$): 12.011 + (4 x 1.008) = 16.043 g/mol}

• Molar Mass of Carbon Dioxide ($\text{CO}_2$): 12.011 + (2x15.999) = 44.009 g/mol

• Mass ratio= Molar mass of CO_{2 /}Molar mass of CH₄= 44.009/16.043=2.743

• Mass of CO₂= 1 x 2.743 = 2.743Kg