Second Ionization Energy Of Calcium?

Not really the best at chemistry and have an exam tomorrow, this is pretty much a guarenteed question so hopefully someone can help me out here: Use this data to determine the second ionization energy of Calcium: (delta)H formation of CaCl2 -804 (delta)H of atomization of Ca +178 Bond dissociation... show more Not really the best at chemistry and have an exam tomorrow, this is pretty much a guarenteed question so hopefully someone can help me out here:

Use this data to determine the second ionization energy of Calcium:

(delta)H formation of CaCl2 -804
(delta)H of atomization of Ca +178
Bond dissociation energy of Cl2 +244
First ionization energy of Ca +590
Electron Affinity of Cl -349
Lattice Energy of CaCl2 -2255

If anyone knows what's going on can you tell me how to do it step by step?!
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