Unit 9.9: Cell Potential and Free Energy
Use signs of ∆G and/or E°cell to distinguish between galvanic and
electrolytic cells.
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What is the sign of ∆G for a galvanic cell? For an electrolytic cell?
- How does the sign of E°cell relate to spontaneity?
Calculate the E°cell of an electrochemical cell.
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Calculate E°cell for Zn²⁺/Zn and Cu²⁺/Cu using standard reduction
potentials.
- Why is E°cell calculated as E°(cathode) - E°(anode)?
Apply the equation ∆G = -nFE°cell.
- Calculate ∆G for a reaction where E°cell = 1.10 V and n = 2.
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Explain the meaning of each variable in the equation ∆G = -nFE°cell.