Graded homework problem 2 (revised).

Element EA IE1 IE2 Ion Radius
  kJ/mol kJ/mol kJ/mol pm
K -48.4 418.8 3051 133 (K+)
I -295.3 1008.4 1845.9 220 (I-)

From above information, if needed, estimate the energy requirement (released or consumed?) when gaseous K and I atoms form a single molecule of [K2+][ I2-] (not K+I- salt). Use +500 kJ/mol as the estimated second electron affinity of iodine and assume no change in distance of closest approach.