For the process O$_2$(g) → 2O(g), $\Delta H^\circ$ = 498kJ × mol$^{-1}$. What would be the predicted sign of $\Delta S^\circ_{rxn}$ and the conditions under which this reaction would be spontaneous?
$\Delta S^\circ_{rxn}$ is negative, and the process is spontaneous at high temperatures only.
$\Delta S^\circ_{rxn}$ is positive, and the process is spontaneous at low temperatures only.
$\Delta S^\circ_{rxn}$ is positive, and the process is spontaneous at high temperatures only.
$\Delta S^\circ_{rxn}$ is negative, and the process is spontaneous at low temperatures only.