How Do You Calculate The Equilibrium Concentration Of A Vacancy?

How Do You Calculate The Equilibrium Concentration Of A Vacancy? Question: Calculate the equilibrium value of vacancies concentration for copper per atom of the order of 10^4 at 1000K the energy for vacancy formation is 0.9eV/atom. Answer:N=N_0+exp(−Q/RT)is something that I know. How do you calculate the energy of vacancy formation? Question: Calculate the equilibrium value