Question
Write the Lewis structure of hydrogen peroxide.
✓
Answer
- $\mathrm{H}^2 \mathrm{O}^2$ structure in gas phase, dihedral angle is $111.5^{\circ}$
- $\mathrm{H}^2 \mathrm{O}^2$ structure in solid phase at 110 K , dihedral angle is $90.2^{\circ}$
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$\begin{matrix}\Delta \text{H}^{\circ}_{f} & -919 \text{kJ mol}^{-1} & 0 & -1577 \text{kJ} \text{ K}^{-1} \text{mol}^{-1} \ \\\text{S}^{\circ}& 273 & 203 & 301 \end{matrix}$
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$\begin{matrix}\Delta \text{H}^{\circ}_{f} & -919 \text{kJ mol}^{-1} & 0 & -1577 \text{kJ} \text{ K}^{-1} \text{mol}^{-1} \ \\\text{S}^{\circ}& 273 & 203 & 301 \end{matrix}$