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+ //Calculate the Potential Energy of Intraction  in between Sodium ion and HCl molucule
+
+//Example 16.2
+
+clc;
+
+clear;
+
+mew=1.08*3.33*10^-30;  //Dipole moment in C m
+
+r=4.0*10^-10; //Distance between Sodium ion and HCl molucule in m
+
+epsilion=8.854*10^-12; //Molar absorption cofficient in C^2 N^-1 m^-2
+
+q=1.602*10^-19; //Charge on electron in C
+
+V1=-(q*mew)/(4*%pi*epsilion*r^2); //Potential energy of intraction in J
+
+V=V1*6.023*10^23/1000; //Potential energy of intraction in kJ mol^-1
+
+printf("Potential energy of intraction in between Sodium ion and HCl molucule = %.0f kJ mol^-1",V); 
+
diff --git a/3856/CH16/EX16.2/Ex16_2.txt b/3856/CH16/EX16.2/Ex16_2.txt
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+ Potential energy of intraction in between Sodium ion and HCl molucule = -19 kJ mol^-1
+\ No newline at end of file