Answer to Question #33015 in Organic Chemistry for savin

Question

acetylene burn in air forming carbon di-oxide and water vapour calculate the volume of air required to completely burn 50 cm cube

Answer 1

C₂H₂ + 5/2O₂ ----------------> 2CO₂ + H₂O

Burning of 1 mole of C₂H₂ requires 2.5 mole O₂

That means 2.5 x 50 cm³ = 125 cm³ O₂

Let total air required is = M

20% of air = 125 cm³ O₂

20 M/100 = 125 cm³ O₂

M = 125 cm³ x 100/20 = 625 cm³

Answer: 625 cm³