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diff --git a/632/CH8/EX8.1/example8_1.sce b/632/CH8/EX8.1/example8_1.sce
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+//clc()
+T = 280;//K
+P = 105;//kPa
+Pas = 13.25;//kPa ( Vpaour pressure of acetone )
+Pa = Pas;// ( As gas is saturated, partial pressure = vapour pressure )
+Mfr = Pa / P;//(Mole fraction) 
+Mpr = Mfr * 100;
+disp("%",Mpr,"(a)The mole percent of acetone in the mixture = ")
+Ma = 58.048;//(molecular weight of acetone)
+Mn = 28;//(molecular weight of nitrogen)
+N = 1;//mole
+Na = Mfr * N;
+Nn = N - Na;
+ma = Na * Ma ;
+mn = Nn * Mn;
+mtotal = ma + mn;
+maper = ma *100 / mtotal;
+mnper = mn *100/ mtotal;
+disp("%",maper,"(b)Weight percent of acetone = ")
+disp("%",mnper,"Weight percent of nitrogen = ")
+Vstp = 22.4;//m^3/kmol
+Pstp = 101.3;//kPa
+Tstp = 273.15;//K
+V = Vstp * Pstp * T / ( Tstp * P );
+C = ma/V;
+disp("kg/m^3",C,"(c)Concentration of vapour = ")
+\ No newline at end of file