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: Calculate ΔS°rxn for the following reaction:4Cr(s) + 3O2(g) → 2Cr2O3(s).Substance            ΔS°, J/K·molCr(s)                        23.77O2(g)                       205.138Cr2O3(s)                 

Solution: Calculate ΔS°rxn for the following reaction:4Cr(s) + 3O2(g) → 2Cr2O3(s).Substance            ΔS°, J/K·molCr(s)                        23.77O2(g)                       205.138Cr2O3(s)                 

Problem

Calculate ΔS°rxn for the following reaction:

4Cr(s) + 3O2(g) → 2Cr2O3(s).

Substance            ΔS°, J/K·mol

Cr(s)                        23.77

O2(g)                       205.138

Cr2O3(s)                  81.2

a. 548.1 J/K

b. 147.7 J/K

c. -147.7 J/K

d. -548.1 J/K