Question

Density of a mixture of CO and CO2 at 303K and 73cm of Hg is 1.5gm/L. What is the mole percent of the the two gases in mixture.

Answer 1

For a mixture of CO and CO2, d = 1.50 g/litre P = 730 / 760 atm, T = 303K PV =w / m RT; PV w / Vm RT 730 / 760 = 1.5 / m × 0.0821 × 303 =∴ 38.85 i.e. molecular weight of mixture of CO and CO2= 38.85 Let % of mole of CO be a in mixture then Average molecular weight = a × 28 + (100 – a) 44 / 100 38.85 = 28a + 4400 – 44a / 100 a = 32.19 Mole % of CO = 32.19 Mole % of CO2= 67.81