For the reaction, \[ X_{2} \mathrm{O}_{4}(l) \longrightarrow 2 \mathrm{XO}_{2}(\mathrm{~g}) \] \...

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For the reaction,
\[
X_{2} \mathrm{O}_{4}(l) \longrightarrow 2 \mathrm{XO}_{2}(\mathrm{~g})
\]
\( \Delta U=2.1 \mathrm{kcal}, \Delta S=20 \mathrm{cal} \mathrm{K}^{-1} \) at \( 300 \mathrm{~K} \) Hence, \( \Delta G \) is :
(A) \( 2.7 \mathrm{kcal} \)
(B) \( 9.3 \mathrm{kcal} \)
(C) \( -2.7 \mathrm{kcal} \)
(D) \( -9.3 \mathrm{kcal} \)
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