For 2Fe3+(aq)+3Sn(s)_2Fe(s)+3Sn2+(aq), the correct answer is -60 kJ. For O2(g)+2H2O(l)+2Cu(s)_4OH_(aq)+2Cu2+(aq), the correct answer is -20 kJ. These are the equilibrium constant for each of the reactions. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
