Question

6. The combustion of gasoline produces carbon dioxide and water. Assume gasoline to be pure octane (C8H18) and calculate how many kilograms of carbon dioxide are added to the atmosphere per 3.9 kg of octane burned. (Hint: Begin by writing a balanced equation for the combustion reaction.) Express your answer using two significant figures.

Answer 1

solution: for combustion of all ages The genesal balanced weachon CnH2n+2 + 3nt I o n co + (+1) H₂O So Balanced reaction for gasoline (C& H18) is + 25 g 8 CO2 + 9 H₂O C& H 18 3.9 kg t from the balanced mol of His mol of 002 equation, we can completely react say that to produce 8 Molecular mass of cq His is = 8x12g + 18x18 = 1148/mol. of co2 = 12g + 2x log = 44 g/mol Molecular mass It means 114 g ag of of His Co His can produce can produce - 8x44 g of co. 8x44 a of SK44 g of co so 3900 g or 3.9kg can produce 3.9 kg can produce 8x44 x 2 144 8x44 x 3900g of co = 9533.3 g of con - 9.5333 kg of con Or, 50 9.533 kg of carbon dioxide (CO₂) are added t the atmosphese per 3. g kg of octane (co Hie