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diff --git a/1808/CH2/EX2.25/Chapter2_Example25.sce b/1808/CH2/EX2.25/Chapter2_Example25.sce
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+++ b/1808/CH2/EX2.25/Chapter2_Example25.sce
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+clc
+clear
+//INPUT DATA
+//0.506 H2 +0.1 CO+0.26 CH4 +0.04 C4H8 +0.004 O2 +0.03 CO2 +0.06N2 +0.21*8 02+0.79 8 N2= a CO2 +b H20 +c O2 +d N2 ;//COMBUSTION EQUATION 
+a=0.55;//CARBON BALANCE
+b=1.186;//HYDROGEN BALANCE
+c=0.621;//OXYGEN BALANCE
+d=6.38;//NITROGEN BALANCE
+
+//CALCULATIONS
+n=a+c+d;//Total moles of dry products 
+nCO2=(a/n)*100;//Analysis of products by volume
+nO2=(c/n)*100;//Analysis of products by volume
+nN2=(d/n)*100;//Analysis of products by volume
+
+//OUTPUT
+printf('Analysis of products by volume \n(i)CO2 %3.2f \n (ii)O2 %3.2f \n (iii)N2 %3.2f ',nCO2,nO2,nN2)