Question

In the combustion of gasoline, shown below, if 15.0 g of CO2 is produced, what volume of oxygen gas would be consumed? Assume STP. You must show your work.

Answer 1

Depends on what you are burning. If it is carbon (ie coal), the answer is 15 (one liter CO2 for each liter of oxygen. Simply add a C onto an O2.) If you are burning octane, (C8H18), for each carbon you would you would have 1 1/8 H2Os and one CO2. To round off slightly (as I do not feel like getting out my calculator) we would have about twice as much oxygen tied up in CO2 as H20 (as there is only one O in H2O vs 2 in CO2). Therefore, in this case, it is ~10 l of CO2 for 15 l of oxygen. Propane will be different again, as will natural gas, etc.

Step-by-step explanation: