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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")
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