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: Consider the following set of reactions: N2 + 2O2 → N2O4 ,ΔH=−8 kJ/mol N2 + O2 → 2NO ,ΔH=180 kJ/mol The equations given in the problem introduction can be added together to give the following reac

Problem

Consider the following set of reactions:

N2 + 2O→ N2O4 ,ΔH=−8 kJ/mol

N2 + O→ 2NO ,ΔH=180 kJ/mol


The equations given in the problem introduction can be added together to give the following reaction:

overall: N2O→ 2NO + O2

However, one of them must be reversed, reaction 1: N2 + 2O→ N2O4

What is the enthalpy for reaction 1 reversed?

reaction 1 reversed: N2O→ N2 + 2O2

Express your answer numerically in kilojoules per mole.

What is the enthalpy for reaction 2?