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Chemistry 18: 6-7

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Gibbs Free Energy

Chapter 18: 6-7 Homework

Reading Preparation

Textbook assignment: Read Kotz and Triechel, Chemistry and Chemical Reactivity Chapter 13: Sections 6 to 7.

Study Notes

Key Formula

Gibbs Free Energy G   =   H     TS G: Gibbs Free Energy
H: Enthalpy
Δ: Change
R, k: Constants
T: Temperature
Gibbs Free Energy Change at STP Δ G o   =   Δ H o     T Δ   S o
Gibbs Free Energy, any Temperature Δ r G   =   Δ G o   +   RT   ln   Q
Change in Gibbs Free Energy at STP Δ r G o   =   RT   ln   k
Free Energy of Formation Δ r G o   =   Σ n Δ f G o ( P )   Σ n Δ f G o ( P )  

Read the following weblecture before chat: Gibbs Free Energy

Study Activity

Videos for Chapter 18: Principles of Chemical Reactivity: Entropy and Free Energy

Review the Videos at Thinkwell Video Lessons.

    • Gibbs Free Energy and Free Energy Change
      • Gibbs Free Energy
      • Standard Free Energy Changes of Formation

Use the instructions at Investigating Entropy in Chemical Reactions from SciencebySimulation and the linked ChemReaX simulator to conduct the endothermic virtual reaction. How does changing temperature affect free energy changes? How does changing temperature affect entropy changes?

Chat Preparation Activities

Chapter Quiz

(Aligns to) AP #15 GUIDED INQUIRY — Titration Methods — Phase III

Complete your analysis; redo your experimental runs if necessary, then post your formal report.