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clear
//
//
//
//Variable declaration
delta_Hf=120*10**3
T1=0 //temperature(K)
T2=300 //temperature(K)
n1=0
N=6.022*10**23
R=8.314
T3=900 //temperature(K)
//Calculation
n2=N*exp(-delta_Hf/(R*T2)) //number of vacancies at 300K(per mol)
n3=N*exp(-delta_Hf/(R*T3)) //number of vacancies at 900K(per mol)
//Result
printf("\n number of vacancies at 0K is %0.3f per mol",n1)
printf("\n number of vacancies at 300K is %0.0f per mol",n2)
printf("\n number of vacancies at 900K is %0.2f *10**16 per mol",n3/10**16)
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