A H2O(l)=H2+½O2 ΔΗº=-285.58 KJmol-1
B C(s)+O2(g)=CO2(g) ΔΗº=-393.5KJmol-1
C H2O(l)=H2O(vap) ΔΗº=-40.7KJmol-1
D H2O(s)=H2O(l) ΔΗº=-6.7KJmol-1
Correct Answer: Option B
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