- #1
MickeyBlue
- 26
- 2
Homework Statement
Felder & Rousseau 4.73 (p. 184)
A mixture of propane and butane is burned with pure oxygen. The combustion products contain 47.4 mole % H2O. After all of the water is removed from the products, the residual gas contains 69.4 mole% CO2 and the balance is O2. What is the mole percent of propane in the fuel?
Homework Equations
1. Let propane = P
2. Choose 100 mol of the reactant fuel as a basis
The Attempt at a Solution
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Set up 2 balanced equations: 1. C3H8 + 5O2 -> 4H2O + 3CO2
2. C4H8 + 13/2O2 -> 5H2O + 4CO2
I assumed a 100% conversion of the reactant gases. I know O2 is in excess. I drew up a reactant table in terms of mol and set Propane in = P and Butane in= 100-P. I then tried to calculate P by setting the mols of water out divided by the total mols out equal to 0.474.