Hess's law, to 285.8 kJ -174.1 kJ - 28.4 kJ

Chemistry
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Chapter1: Chemical Foundations
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3. The following reaction depicts one way in which nitric acid could be formed:
N2O5 + H2O → 2 HNO3 AH = ?
Use the following information, and apply Hess's law, to determine the missing value.
H2+1/2 02 → H₂O
AH = -285.8 kJ
12 N2 + 3/2 02 + 2 H2 → HNO3
2N2 +5 02 → 2 N2O5
AH = -174.1 kJ
ΔΗ = + 28.4 kJ
Transcribed Image Text:3. The following reaction depicts one way in which nitric acid could be formed: N2O5 + H2O → 2 HNO3 AH = ? Use the following information, and apply Hess's law, to determine the missing value. H2+1/2 02 → H₂O AH = -285.8 kJ 12 N2 + 3/2 02 + 2 H2 → HNO3 2N2 +5 02 → 2 N2O5 AH = -174.1 kJ ΔΗ = + 28.4 kJ
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