Question

Acetylene C2H2 burns in air forming carbon dioxide CO2 and water vapour H2O .Calculate the volume of air required to completely burn 50 cc of acetylene. Assume air contains 20% oxygen...

Answer 1

Well first balance the equation 2C2H2 + 5H2O gives 4CO2 + 2H20
2 : 5
50: x
X=50×5÷2
= 125cm3
then 20% of air=125
Air=125×100÷20
=625cm3 ans