Unit 9 · Thermodynamics and Electrochemistry

Chapter 9.3

Free Energy, Equilibrium, Dissolution, and Coupled Reactions

A cell builds proteins by running reactions that should not run, and it pays for each one with a reaction that runs downhill. Free energies add, so a favorable step can carry an unfavorable one.

in preparation · lesson 43 of 45

By the end

  1. 01Relate the standard free energy change's sign and size to K above or below 1
  2. 02Reason qualitatively about K from how the free energy change compares with RT
  3. 03Explain a salt's solubility through the enthalpy and entropy of dissolving
  4. 04Explain how coupling to a favorable reaction or supplying external energy drives an unfavorable one

In unit 9

  1. 9.1Entropy: How Matter and Energy Spread Out
  2. 9.2Gibbs Free Energy, Thermodynamic Favorability, and Kinetic Control
  3. 9.3Free Energy, Equilibrium, Dissolution, and Coupled Reactions
  4. 9.4Galvanic and Electrolytic Cells: Voltage from Free Energy
  5. 9.5Cells Away from Standard Conditions, and Electrolysis
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