Consider the reaction of N2O5 at 25°C for which the following data are relevant:
2 N2O5 (g) → 4 NO2 (g) + O2 (g)
Substance ΔH°f S°
N 2O5 11.29 kJ/mol 355.3 J/K mol
NO 2 33.15 kJ/mol 239.9 J/K mol
O 2 ? 204.8 J/K mol
What is ΔH° for the reaction?
a) 110.02 kJ
b) 21.86 kJ
c) -21.86 kJ
d) 155.20 kJ
e) -155.20 kJ
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