Question

A mixture of co and co2 is found to have a density 1.5gl at 30 degree and 730 torr what is composition of 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

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