Question

On complete combustion of gaseous mixture of propane and butane, 10L CO₂ is formed. Calculate the composition of gaseous mixture.

Answer 1

Suppose, volume of propane in mixture = xL 

Volume of butane in mixture = (3 - x) L 

1L C₃Hg gives CO₂ = 3 L. 

x L C₃H₈ gives CO₂ = 3x L 

1L C₄H₁₀ give CO₂ = 4L 

(3 - x) LC₄H₁₀ gives CO₂ = 4 × (3 - x) L 

Volume of free CO₂ = 10 L 

3x + 4(3 - x) = 10 

3x + 12 4x = 40 

- x = 10 -12 

x = 2 

Volume of propane = 2 L 

Volume of butane = (3 - 2) = 1L