For the equilibrium,
`PCI_(5)(g) hArr PCI_(3)(g) +CI_(2)(g) at 25^(@)C K_(c) =1.8 xx 10^(-7)`
Calculate `DeltaG^(Theta)` for the reaction `(R = 8.314 J K^(-1) mol^(-1))`.

Explanation

To calculate the standard Gibbs free energy change (ΔG°) for the reaction given the equilibrium constant (Kc), we can use the following formula:

\[ \Delta G^\circ = -RT \ln K_c \]

Where:
- \( R \) is the universal gas constant (8.314 J K⁻¹ mol⁻¹)
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