2. Which equation represents the reaction for which the enthalpy change is the standard enthalpy change of formation, AH¡ ,of sodium nitrate, NaN0;? ΔΗ (1) OA Na(s)+½N2(g) + 1½O2(g) → NaNO3(s) OB 2Na(s) + N2(g) + 302(g) → 2NANO;(s) OC Na(s)+N(g) + 30(g) → NANO3(s) OD Na(g) + ½N2(g) + 1½O2(g) → NaNO3(g)

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