Tuesday
September 23, 2014

Homework Help: College Chem

Posted by D on Monday, October 4, 2010 at 12:39am.

How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned?

C7H8 + 9O2 ==> 7CO2 + 4H2O

1 gallon toluene = about 3,785 mL
density = about 0.867 g/mL
mass toluene = 3785 mL x 0.867 g/mL = 3282 grams.
moles toluene = grams/molar mass = 3282/92 = about 36 moles.
From the equation above, 1 mole C7H8 will produce 7 moles CO2; therefore, 36 moles toluene will produce 7 x 36 = about 250 moles CO2..

PV = nRT– V=250 X 8.314 X 293 / 750 = 812 L

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