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//(12.2) A gas mixture has the following composition in terms of mass fractions: H2, 0.10; N2, 0.60; CO2, 0.30. Determine (a) the composition in terms of mole fractions and (b) the apparent molecular weight of the mixture.
//solution
//variable initialization
mf1 = .1 //mass fractiion of H2
mf2 = .6 //mass fraction of N2
mf3 = .3 //mass fraction of CO2
//part(a)
M1 = 2 //molar mass of H2 in kg/kmol
M2 = 28 //molar mass of N2 in kg/kmol
M3 = 44 //molar mass of CO2 in kg/kmol
n1 = (mf1/M1)/(mf1/M1 + mf2/M2 + mf3/M3) //mole fraction of H2
n2 = (mf2/M2)/(mf1/M1 + mf2/M2 + mf3/M3) //mole fraction of N2
n3 = (mf3/M3)/(mf1/M1 + mf2/M2 + mf3/M3) //mole fraction of CO2
printf('the mole fraction of H2 in percentage is: %f',n1*100)
printf('\nthe mole fraction of N2 in percentage is: %f',n2*100)
printf('\nthe mole fraction of CO2 in percentage is: %f',n3*100)
//part(b)
M = n1*M1 + n2*M2 + n3*M3 //in kg/kmol
printf('\n\nthe apparent molecular weight of the mixture in kg/kmol is: %f',M)
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