Please show work Compute the fraction of atom sites that are vacant for nickel a

Question

Please show work

Compute the fraction of atom sites that are vacant for nickel at 1400 degree C. Assume an energy for vacancy formation of 0.9 eV/atom. Please note what this question is asking for - the FRACTION of atom sites that are vacant. ANSWER: 1.94 times 10-3 Use your answer from problem 1 to calculate the number of vacancies in 2 cm3 of nickel at 1400 degree C. (You will need additional data that is available in the table in the front cover of your book. Note the conditions under which the data available in the book were collected. If these conditions don't match those of the problem, use the values anyway, but make a note as to how the value for the correct conditions would have been different from the given value - i.e. larger or smaller by a lot or a little - and describe how this would have affected your result.) ANSWER: 3.55 times 1020 vacancies

Explanation / Answer

Nv/N = e^(-Qv/KT)

     =   e^(-0.9/8.62*10^-5*1673)

   = 1.94 *10^-3

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