How is free energy change of a cell reaction related to (i) its emf (ii) equilibrium constant of the cell reaction?

Explanation

To solve the question about how the free energy change of a cell reaction is related to its EMF and equilibrium constant, we can break it down into two parts:

### Part (i): Relationship between Free Energy Change and EMF

1. **Understanding Free Energy Change (ΔG)**:
- The free energy change (ΔG) is a thermodynamic quantity that indicates the spontaneity of a reaction. If ΔG is negative, the reaction is spontaneous.

2. **Expression Relating ΔG to EMF**:
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