1. Gasoline (assumed to be 100% octane) is combusted in your car according to th

Question

1. Gasoline (assumed to be 100% octane) is combusted in your car according to the following chemical reaction:
2 C8H18 + 25 O2 -> 16 CO2 + 18 H2O

For each kg of octane burned, how many kg of carbon dioxide is released?



2. Gasoline (assumed to be 100% octane) is combusted in your car according to the following chemical reaction:
2 C8H18 + 25 O2 -> 16 CO2 + 18 H2O

How many tons of CO2 are exhausted when driving 9,367 miles?

Assume a gasoline density of 6.07 lb/gal
Assume 27.8 miles per gallon
1 ton = 2000 lbs
Answer tolerance

Explanation / Answer

1)

the balanced equation for octane's combustion is (where the total numbers of oxygens, hydrogens & carbons balance on both sides of the equation) :
2 C8H18 + 25 O2 ---> 16 CO2 + 18 H2O

Carbon has an atomic weight of 12,
Oxygen has an atomic weight of 16
& Hydrogen has an atomic weight of 1

Octane has a molecular weight of (12 x 8) + (1 x 18) = 96 + 18 = 114
Carbon dioxide has a molecular weight of (12 x 1) + (16 x 2) = 44

2 moles of octane weighing 114 units each (228 weight units) produce on combustion, 16 moles of carbon dioxide weighing 44 units each (16 x 44 = 704 weight units)

If the burning of 228 kilograms of octane produce 704 kilograms of carbon dioxide
then 1 kilogram of octane will produce 704 / 228 kilograms of carbon dioxide
SO ANSWER = 3.08 KG

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