Thermodynamics of Equilibrium Constant

At $298 \mathrm{K}$, the equilibrium constant of the process $1.5{\mathrm{O}}_{2 \left(\mathrm{g}\right)}\rightleftharpoons {\mathrm{O}}_{3 \left(\mathrm{g}\right)}$ is $3\times {10}^{-29}$. Standard free energy change (in $\mathrm{kJ} {\mathrm{mol}}^{-1}$ ) of the process is approximately $\left(\mathrm{R}=8.314 \mathrm{J} {\mathrm{mol}}^{-1} {\mathrm{K}}^{-1}; \log 3=0.47\right)$