Ch.6 - Thermochemistry WorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Using Hess’s Law, determine the ΔH of the following reaction: N2(g) +  2O2(g)  →  2NO2(g) Given the following equations N2(g)  +  3H2(g)  →  2NH3(g)                                       ΔH = -115

Problem

Using Hess’s Law, determine the ΔH of the following reaction:

N2(g) +  2O2(g)  →  2NO2(g)

Given the following equations

N2(g)  +  3H2(g)  →  2NH3(g)                                       ΔH = -115 kJ

2NH3(g)  +  4H2O(l)  →  2NO2(g)  +  7H2(g)                ΔH = -142.5 kJ

H2O(l)  →  H2(g)  +  1/2O2(g)                                      ΔH = -43.7 kJ