What is the relationship between Gibbs free energy of the cell reaction in a galvanic cell and the emf of the cell ? When will the maximum work be obtained froma galvanic cell ?

Explanation

### Step-by-Step Solution:

1. **Understanding Gibbs Free Energy (ΔG)**:
- Gibbs free energy (ΔG) is a thermodynamic potential that measures the maximum reversible work obtainable from a thermodynamic system at constant temperature and pressure. In the context of electrochemistry, it indicates the spontaneity of a reaction.

2. **Understanding EMF (Electromotive Force)**:
- The electromotive force (E_cell) of a galvanic cell is the voltage produced by the cell when no current is flowing. It represents the potential difference between the two electrodes.

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