17.1 The equilibrium law
Essential Idea:
The position of equilibrium can be quantified by the equilibrium law. The equilibrium constant for a particular reaction only depends on the temperature.
Understandings:
- Le Châtelier’s principle for changes in concentration can be explained by the equilibrium law.
- The position of equilibrium corresponds to a maximum value of entropy and a minimum in the value of the Gibbs free energy.
- The Gibbs free energy change of a reaction and the equilibrium constant can both be used to measure the position of an equilibrium reaction and are related by the equation, ∆𝐺 = −𝑅T ln𝐾 .
Applications and Skills:
- Solution of homogeneous equilibrium problems using the expression for Kc.
- Relationship between ∆G and the equilibrium constant.
- Calculations using the equation ∆𝐺 = −𝑅T ln𝐾.