Hess's Law
8. Thermochemistry / Hess's Law / Problem 4
Given the following data:
H2(g) + 1/2 O2(g) → H2O(l) ΔH = –285.8 kJ
N2O5(g) + H2O(l) → 2 HNO3(l) ΔH = –76.6 kJ
1/2 N2(g) + 3/2 O2(g) + 1/2 H2(g) ΔH = –174.1 kJ
Calculate ΔH for 2 N2O5(g) → 2 N2(g) + 5 O2(g)
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