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diff --git a/3755/CH1/EX1.3/Ex1_3.sce b/3755/CH1/EX1.3/Ex1_3.sce
new file mode 100644
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+clear
+//
+//
+//
+
+//Variable declaration    
+N=6.02*10^26;           //Avagadro Number
+e=1.6*10^-19;      //charge(coulomb)
+x=9*10^9;          
+r0=0.324*10^-9;    //equilibrium distance(m)
+A=1.748;      //madelung constant
+n=9.5;       //repulsive exponent value
+
+//Calculations
+U0=(A*e*x/r0)*(1-1/n);     
+U=(U0)*N*e*10^-3;      //binding energy(kJ/kmol)
+
+
+//Result
+printf("\n binding energy is %0.0f *10^3 kJ/kmol",U/10^3)
+printf("\n answer in the book varies due to rounding off errors")