The number of vacancies in some hypothetical metal increases by a factor of five when the temperature is increased from 954 K to 1072 K. Calculate the energy of vacancy formation (in J/mol) for this metal assuming that the density remains the same over this temperature range. 1. Calculate the energy for the formation of Schottky defects in MgO given that at 1100C the number of defects and density are, respectively, 4.4 x 1016 m 3 and 3.40 g/cm 3 2