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# Calculate the standard entropy change for a reaction $XY$ if the value of $\Delta H^{\circ} = 28.4 \: kJ$ and equilibrium constant is $1.8 \times 10^{-7}\: at\: 298\: K$.

$\begin {array} {1 1} (A)\;-33.8 \: J/Kmol & \quad (B)\;38.484 \: J/Kmol \\ (C)\;-38.484 \: J/Kmol & \quad (D)\;33.8 \: J/Kmol \end {array}$