What is the gibbs free energy change for the given reaction at 25ºC? 
 Au³⁺ (aq) + 3 Li (s)  →. Au (s) + 3 Li⁺ (aq)
Given the following reduction potentials: 
Au³⁺(aq) + 3 e^–  →. Au (s)                         E°_red = + 1.50 Volts
Li⁺ (aq) + e^–  →. Li (s)                                E°_red = – 3.04 Volts

The reduction of chlorate is given by the equation: 

ClO₃^– (aq) + 6 H₃O⁺ (aq) → Cl ^– (aq) + 9 H₂O (l)

If the standard cell potential is given as 1.373 V, how many electrons are transferred under standard conditions?

Calculate ∆G°_rxn and K for each reaction.

a. The disproportionation of Mn²⁺(aq) to Mn(s) and MnO₂(s) in acid solution at 25 °C.

b. The disproportionation of MnO₂(s) to Mn²⁺(aq) and MnO₄^–(aq) in acid solution at 25 °C.

The silver oxide–zinc battery used in watches delivers a voltage of 1.60 V. Calculate the free-energy change (in kilo-joules) for the cell reaction