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clear;
clc;
printf("\t Example 2.5.a\n");
//position 1 moles molefraction
// air 80 0.8
// water 20 0.2
//position 2 moles molefraction
// air 10 0.1
// water 90 0.9
ya1=0.8;
ya2=0.1;
T=(273+35); //temperature in kelvin
pt=1*1.013*10^5; //total pressure in pascal
z=0.3*10^-3; //gas film thickness in m
Dab=.18*10^-4; //diffusion coefficient in m^2/s
R=8314; //universal gas constant
Na=Dab*pt*(ya1-ya2)/(z*R*T) //diffusion flux in kmol/m^2*s
rate=Na*100*10^-4*3600*46; //since molecular weight of mixture is 46
printf("\n rate of diffusion of alcohol-water vapour :%f kg/hr ",rate);
//end
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