For the disproportionation reaction $2 \mathrm{Cu}^{+}(\mathrm{ag}) \rightleftharpoons \mathrm{Cu}(\mathrm{s})+\mathrm{Cu}^{2+}(\mathrm{ag})$ at $298 \mathrm{~K} . \mathrm{In} \mathrm{K}$ (where K is the equilibrium constant) is $\_\_\_\_$ $\times 10^{-1}$.
Given :
$$
\left(\mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}}^0=0.16 \mathrm{~V} ; \quad \mathrm{E}_{\mathrm{Cu}^{+} / \mathrm{Ou}}^0=0.52 \mathrm{~V} ; \frac{\mathrm{RT}}{\mathrm{~F}}=0.025\right)
$$
