Born Haber Cycles

Question 1

Why is the first electron affinity exothermic?

Answer 1

There attraction between the nucleus of the atom and the extra electron, give out heat energy

Question 2

What makes a reaction more exothermic?

Answer 2

⬆️ the charge on the ion the more energy is given out when the lattice forms

e.g 0^2- is more exothermic than Cl^1-

⬇️ the ionic radius the more exothermic lattice of formation is. Bigger charge density leads to a stronger attraction.

e.g Li^+ is more exothermic than Br^-