d) Considering only the major species and assuming complete combustion

Chemistry
Tutor: None Selected Time limit: 1 Day

Consider the combustion of 1 mole of acetylene (C2H2) and 3 moles of oxygen (O2).

d) Considering only the major species and assuming complete combustion, what is the composition (in mole fractions) of each species in the combustion products?

Nov 30th, 2014

Consider the combustion of 1 mole of acetylene (C2H2) and 3 moles of oxygen (O2).

d) Considering only the major species and assuming complete combustion, what is the composition (in mole fractions) of each species in the combustion products?

Answer:

According to the reaction:

2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l)

                                      2 mol         1 mol

Mole fraction of CO2 = n(CO2) / (n(CO2) + n(H2O))

Mole fraction of H2O = n(H2O) / (n(CO2) + n(H2O))

So the mol total = 2 mol + 1 mol = 3 mol

Mole fraction of CO2 = 2 mol / 3 mol = 0.667

Mole fraction of H2O = 1 mol / 3 mol = 0.333 


Nov 30th, 2014

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