IB Chemistry - Equilibrium

IB Chemistry home > Syllabus 2025 > Equilibrium > Physical equilibria

The term "equilibrium" refers to a situation where there is a balance between the forces acting upon a system, resulting in no overall change to the system. There are three different types of equilibrium:

  • Stable equilibrium
  • Unstable equilibrium
  • Dynamic equilibrium

The first two apply to physical situations where forces acting on a body are balanced in some way and the body does not move. The third case, dynamic equilibrium, refers to a situation of continual change, where the overall concentrations of the components remain unchanged.

In Chapter 7.1