For which of the following processes does the enthalpy change represent the enthalpy of formatio...

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For which of the following processes does the enthalpy change represent the enthalpy of formation of \( \mathrm{NaOH} \) ?
(A) \( \mathrm{Na}^{+}(\mathrm{aq})+\mathrm{OH}^{-}(\mathrm{aq}) \longrightarrow \mathrm{NaOH}(\mathrm{s}) \)
(B) \( \mathrm{Na}(\mathrm{s})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g})+\frac{1}{2} \mathrm{H}_{2}(\mathrm{~g}) \longrightarrow \mathrm{NaOH}(\mathrm{s}) \)
(C) \( 2 \mathrm{Na}(\mathrm{s})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \longrightarrow 2 \mathrm{NaOH}(\mathrm{aq})+\mathrm{H}_{2}(\mathrm{~g}) \)
(D) All of these
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