12. A galvanic cell is based on the following half-reactions: The cell runs spontaneously. Write and balance the overall redox reaction and calculate the ε° (cell potential) and ΔG° (free energy).

2. The reaction of ethane gas (C2H6) with chlorine gas produces C2H5Cl as its main product (along with HCl) and a variety of other minor products. Calculate the percent yield of C2H5Cl if the reaction of 300. g of ethane with 650. g of chlorine produced 490. g of C2H5Cl. (atomic mass: C, 12.01； Cl, 35.45； H, 1.008)

12. A galvanic cell is based on the following half-reactions:
The cell runs spontaneously. Write and balance the overall redox reaction and calculate the ε° (cell potential) and ΔG° (free energy).

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