Question

Q1. Acetylene[C2H2] burns in air forming carbon dioxide and water vapour. Calcu;late the volume of air reqired to completely burn 50cm3 of acetylene [assume air contains 20% of axygen

Answer 1

Reaction of burning of acetylene:

50cm^3 V
2HC=CH + 3O₂ = 4CO₂ + 2H₂O
2 3

Volume is next:

V= 50 * 3 /2 = 75 cm³ of Oxygen required for this burning.

If 75 cm³ is 20 %
x is 100%

x= 375 cm^3 of air.