Energetics I Flashcards
(3 cards)
1
Q
why is 1st electron affinity exothermic (-ve) ?
EA: gaseous atomes acquire e-
A
attraction between nucleus of X atom and added e- is more than repulsion b/w e- and newly added e-
see the exact definitions on this in notes
2
Q
why is 2nd electron affinity exothermic (+ve) ?
A
energy is required to overcome repulsion when e- is added to negatively charged X ion
3
Q
A
