The Balanced Chemical Equation Corresponding to the Standard Enthalpy of Formation

Multiple Choice

The balanced chemical equation corresponding to the standard enthalpy of formation of NaCl is:

A) Na₂(s) + Cl₂(g) → 2NaCl(s) .
B) 2Na(s) + Cl₂(g) → 2NaCl(s) .
C) Na(s) + Cl₂ (g) → NaCl(s) .
D) Na(s) + ½ Cl₂(g) → NaCl(s) .
E) Na(s) + Cl(g) → NaCl(s) .