A gas mixture has the following composition on a molar basis: Component Xi MWi C

Question

A gas mixture has the following composition on a molar basis:

Component        Xi     MWi

CH4                0.1    16

C2H6              0.2       30

CO2               0.3       44

NO2                ?         46

Calculate:
(a) Mixture composition (mass fraction) of 100 kg-mole of mixture.
(b) Average Molecular Weight of the mixture expressed in lbm/lb-mole and g/g-mole.
(c) How many grams of C2H6 are in 50 lb-mole of mixture?
(d) How many kg-mole of CH4 are in 20 kg of mixture?
(e) How many grams of CO2 are in the mixture when there are 15 g-mole of NO2 ?
(f) Mixture mole fraction (CO2 and NO2 free basis)

Please show steps, Thank You!!!

Explanation / Answer

1) Xi (no2) = 0.4

b) Average Molecular Weight of the mixture expressed in lbm/lb-mole and g/g-mole= 39.2 units

=summation(mixi*xi)/summation(xi)

3) 7.65 lb/mole

4)10.76

5) co2=.337            no2=.469

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