For the reaction $\mathrm{X}_{2} \mathrm{O}_{4}(\ell) \rightarrow 2 \mathrm{XO}_{2}(\mathrm{g})$ at 298 K , given the values, $\Delta \mathrm{U}=9 \mathrm{kJ}$ and $\Delta \mathrm{S}=84 \mathrm{JK}^{-1}, \Delta \mathrm{G}$ is
(a)-11.08 kJ
(b)+11.08 kJ
(c)-13.55 kJ
(d)+13.55 kJ
Answer
Answer: A ✓ checked by 4AB · confidence high
The source book printed C; on checking, A is correct — see the explanation.
Two models agree after a crop recheck; owner approved 11 Nov 2026.