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 the standard entropy data in Appendix G to determine the change in entropy for each of the reactions listed below. All the processes occur at the standard conditions and 25 °C.(a) C(s, graphite) + O2(g) ⟶ CO2(g)(b) O2(g) + N2(g) ⟶ 2NO(g)(c) 2Cu(s) + S(g) ⟶ Cu2 S(s)(d) CaO(s) + H2 O(l) ⟶ Ca(OH)2(s)(e) Fe2 O3(s) + 3CO(g) ⟶ 2Fe(s) + 3CO2(g)(f) CaSO4 ·2H2 O(s) ⟶ CaSO4(s) + 2H2 O(g)

Problem

Use the standard entropy data in Appendix G to determine the change in entropy for each of the reactions listed below. All the processes occur at the standard conditions and 25 °C.

(a) C(s, graphite) + O2(g) ⟶ CO2(g)
(b) O2(g) + N2(g) ⟶ 2NO(g)
(c) 2Cu(s) + S(g) ⟶ Cu2 S(s)
(d) CaO(s) + H2 O(l) ⟶ Ca(OH)2(s)
(e) Fe2 O3(s) + 3CO(g) ⟶ 2Fe(s) + 3CO2(g)
(f) CaSO4 ·2H2 O(s) ⟶ CaSO4(s) + 2H2 O(g)