Ch. 17 - Chemical ThermodynamicsWorksheetSee 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: Use Hess's law to calculate ΔG°rxn using the following information. CO(g) → C(s) + 1/2 O2(g)         ΔG°rxn = ?   CO2(g) → C(s) + O2(g)              ΔG°rxn = +394.4kJ CO(g) + 1/2 O2(g) → CO2(g)      ΔG°rxn = -257.2 kJ   A) -60.0 kJ B) +651.6 kJ C) -265.8 kJ D) +137.2 kJ E) +523.0 kJ  

Problem

Use Hess's law to calculate ΔG°rxn using the following information.

CO(g) → C(s) + 1/2 O2(g)         ΔG°rxn = ?

 

CO2(g) → C(s) + O2(g)              ΔG°rxn = +394.4kJ

CO(g) + 1/2 O2(g) → CO2(g)      ΔG°rxn = -257.2 kJ

 

A) -60.0 kJ

B) +651.6 kJ

C) -265.8 kJ

D) +137.2 kJ

E) +523.0 kJ