Calculate the standard entropy of reaction for solid sodium reacting with chlorine gas to form solid NaClNaCl at 25 ∘C∘C. 2Na(s)+Cl2(g)→2NaCl(s)2Na(s)+Cl2(g) →2NaCl(s) Substance and State S∘[J/(K⋅mol)]S∘[J/(K⋅mol)] Na(s)Na(s) 51.2 Cl2(g)Cl2(g) 223.0 NaCl(s)NaCl(s) 72.1