The enthalpy change of which reaction corresponds to $\Delta H_f^o$ for $Na_2CO_{3(s)}$ at $298 \ K$?
- A$2Na_{(s)} + C_{(s)} + \frac{3}{2} O_{2(g)} \to Na_2CO_{3(s)}$
- B$Na_2O_{(s)} + CO_{2(g)} \to Na_2CO_{3(s)}$
- C$2Na_{(aq.)}^{+} + CO_{3(aq.)}^{2-} \to Na_2CO_{3(s)}$
- D$2Na_{(aq.)}^{+} + 2OH_{(aq.)}^{-} + CO_{2(g)} \to Na_2CO_{3(s)} + H_2O_{(l)}$
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