A Pb ( s ) | Pb 2 + ( aq ) | | Au 3 + ( aq ) | Au ( s ) galvanic cell has a standard cell potential of 1.628 V. Calculate the Gibbs free energy change at 25 °C when 2.45 g of gold is deposited. Assume that the concentrations in the cell remain at the standard state values of 1 M through the entire deposition process.