r r
SOLUTION MANUAL
r
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1.1 a.r Concentrationrofrar gasrmixture.
Armixturerofrnoblergasesr[heliumr(1),rargonr(2),rkryptonr(3),randrxenonr(4)]risratrartotalrpressurerofr200rk
Parandrartemperaturerofr400rK.rIfrthermixturerhasrequalrmolerfractionsrofreachrofrthergases,rdetermine:
a) Thercompositionrofrthermixturerinrtermsr ofrmassr fractions.
Solution:
Basis:r 100rkmolerofrthermixture
b) Theraveragermolecularrweightrofrthermixture.
Solution
c) Thertotalrmolarrconcentration.
Solution
d) Thermassrdensity.
Solution
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1.2 a.r Concentrationrofrar liquidrsolutionrfedrtorar distillationrcolumn.
Arsolutionrofrcarbonrtetrachlorider(1)randrcarbonrdisulfider(2)rcontainingr50%rbyrweightreachrisrtorberco
ntinuouslyrdistilledratrtherraterofr4,000rkg/hrDetermine:
a) Therconcentrationrofrthermixturerinrtermsrofrmolerfractions.
Solution
Basis:r 100rkgrmixture
b) Theraveragermolecularrweightrofrthermixture.
Solution
c) Calculatertherfeedrraterinrkmol/h.
Solution
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1.3 a.r Concentrationr ofrliquifiedr naturalr gas.
Arsamplerofrliquifiedrnaturalrgas,rLNG,rfromrAlaskarhasrtherfollowingrmolarrcomposition:r93.5%rCH4,r4.
6%rC2H6,r1.2%rC3H8,randr0.7%rCO2.rCalculate:
a) AveragermolecularrweightrofrtherLNGrmixture.
Solution
b) WeightrfractionrofrCH4r inrthermixture.
Solution
Basis:r 100rkmolesr ofrLNG
c) TherLNGrisrheatedrtor300rKrandr140rkPa,randrvaporizesrcompletely.rEstimatertherdensityrofrthergasr
mixturerunderrtheserconditions.
Solution