Calculate the value of Gibbs free energy change and the equilibrium constant under standard conditions for the following reactions. (Show all work to receive karma pts)
a. Zn + Cu+2 ? Cu + Zn+2 E°cell = +1.10 V
b. I2 + 2Br- ? Br2 + 2I- E°cell = -0.52 V
c. 2Na(s) + 2H2O(l) ? 2Na+ + 2OH- +H2(g) E°cell = +2.30V