For the reaction
2 SO3(g) → 2 SO2(g) + O2(g)
∆H◦r = +198 kJ·mol−1 at 298 K. Which statement is true for this reaction?
1. The reaction will not be spontaneous at any temperature.
2. The reaction will not be spontaneous at high temperatures.
3. ∆G◦r will be negative at high temperatures.
4. ∆G◦r will be positive at high temperatures.
5. The reaction is driven by the enthalpy.
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