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: The Kb for methylamine, CH3NH2, at 25°C is 4.4 x 10-4a. Write the chemical equation for the equilibrium that corresponds to K b.b. By using the value of Kb, calculate ΔG° for the equilibrium in part a.c. What is the value of ΔG at equilibrium?d. What is the value of ΔG when [H +] = 1.6 ×10-8 M, [CH3NH3+] = 5.5 ×10-4 M, and [CH3NH2] = 0.130 M?

Problem

The Kb for methylamine, CH3NH2, at 25°C is 4.4 x 10-4

a. Write the chemical equation for the equilibrium that corresponds to K b.


b. By using the value of Kb, calculate ΔG° for the equilibrium in part a.




c. What is the value of ΔG at equilibrium?


d. What is the value of ΔG when [H +] = 1.6 ×10-8 M, [CH3NH3+] = 5.5 ×10-4 M, and 

[CH3NH2] = 0.130 M?