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Hess's Law

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Internal Energy	22 mins	0 completed	Learn
Calorimetry	39 mins	0 completed	Learn
Thermochemical Equation	6 mins	0 completed	Learn Summary
Hess's Law	17 mins	0 completed	Learn
Enthalpy of Formation	13 mins	0 completed	Learn Summary
End of Chapter 6 Problems	52 mins	0 completed	Learn

Additional Practice
Units of Energy

Additional Guides
Endothermic & Exothermic Reactions
Enthalpy

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Next SectionEnthalpy of Formation

Solution: Calculate ΔH for the reaction N₂H₄(l) + O₂ (g) → N₂ (g) + 2H₂O (l)given the following data2 NH₃ (g) + 3N₂O (g) → 4N₂(g) + 3H₂O (l) ΔH = -1010 kJN₂O (g) + 3 H₂(g) → N₂H₄ (l) + H₂O (l) ΔH = -317 kJ2NH₃ (g) + 1/2 O₂(g) → N₂H₄ (l) + H₂O (l) ΔH = -143 kJH₂(g) + 1/2 O₂(g) → H₂O (l) ΔH = -286 kJ

Solution: Calculate ΔH for the reaction N2H4 (l) + O2 (g) → N2 (g) + 2H2O (l)given the following data2 NH3 (g) + 3N2O (g) → 4N2(g) + 3H2O (l) ΔH = -1010 kJN2O (g) + 3 H2 (g) → N2H4 (l) + H2O (l)

Problem

Calculate ΔH for the reaction

N₂H₄(l) + O₂ (g) → N₂ (g) + 2H₂O (l)

given the following data

2 NH₃ (g) + 3N₂O (g) → 4N₂(g) + 3H₂O (l) ΔH = -1010 kJ

N₂O (g) + 3 H₂(g) → N₂H₄ (l) + H₂O (l) ΔH = -317 kJ

2NH₃ (g) + 1/2 O₂(g) → N₂H₄ (l) + H₂O (l) ΔH = -143 kJ

H₂(g) + 1/2 O₂(g) → H₂O (l) ΔH = -286 kJ

Hess's Law

Solution: Calculate ΔH for the reaction N2H4 (l) + O2 (g) → N2 (g) + 2H2O (l)given the following data2 NH3 (g) + 3N2O (g) → 4N2(g) + 3H2O (l) ΔH = -1010 kJN2O (g) + 3 H2 (g) → N2H4 (l) + H2O (l)

Problem

Practice Problems

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