Ch. 17 - Chemical ThermodynamicsSee 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: Which one of the following reactions is most likely to have a positive ΔS°? a) Cu2+ (aq) + 4 Cl -  (aq) → CuCl42-(aq) b) SiH4 (g) + 2O2 (g) → SiO2 (s) + 2 H2O (g) c) SiF4 (g) + 2 H2O (g)  → SiO2 (s) + 4 HF (g) d) H2O (l)  → H2O (s) e) NO (g) + O3 (g)  → NO2 (g) + O2 (g)    

Problem

Which one of the following reactions is most likely to have a positive ΔS°?

a) Cu2+ (aq) + 4 Cl -  (aq) → CuCl42-(aq)

b) SiH4 (g) + 2O2 (g) → SiO2 (s) + 2 H2O (g)

c) SiF4 (g) + 2 H2O (g)  → SiO2 (s) + 4 HF (g)

d) H2O (l)  → H2O (s)

e) NO (g) + O3 (g)  → NO2 (g) + O2 (g)