List of types of equilibrium

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This is a list of various types of equilibrium, the condition of a system in which all competing influences are balanced.



  • Equilibrant Force, which keeps any object motionless and acts on virtually every object in the world that is not moving
  • Equilibrium figures of Earth and planets (physical geodesy)
  • Equilibrium mode distribution, the state of fiber optic or waveguide transmission in which the propagation mode does not vary with distance along the fiber or changes in the launch mode
  • Hydrostatic equilibrium, the state of a system in which compression due to gravity is balanced by a pressure gradient force
  • Hyperbolic equilibrium point, a mathematical concept in physics
  • Mechanical equilibrium, the state in which the sum of the forces, and torque, on each particle of the system is zero
  • Radiative equilibrium, the state where the energy radiated is balanced by the energy absorbed
  • Secular equilibrium, a state of radioactive elements in which the production rate of a daughter nucleus is balanced by its own decay rate
  • Thermodynamic equilibrium, the state of a thermodynamic system in which there are no net flows of matter or energy
  • Isostatic equilibrium, in geology, the balance between gravitation and buoyancy of the earth's crust in the mantle


  • Chemical equilibrium, the state in which the concentrations of the reactants and products have stopped changing in time
  • Diffusive equilibrium, when the concentrations of each type of particle have stopped changing
  • Thermal equilibrium, a state where an object and its surroundings cease to exchange energy in the form of heat, i.e. they are at the same temperature
  • Donnan equilibrium, the distribution of ion species between two ionic solutions separated by a semipermeable membrane or boundary
  • Dynamic equilibrium, the state in which two reversible processes occur at the same rate
  • Equilibrium constant, a quantity characterizing a chemical equilibrium in a chemical reaction
  • Partition equilibrium, a type of chromatography that is typically used in GC
  • Quasistatic equilibrium, the quasi-balanced state of a thermodynamic system near to equilibrium in some sense or degree
  • Schlenk equilibrium, a chemical equilibrium named after its discoverer Wilhelm Schlenk taking place in solutions of Grignard reagents
  • Solubility equilibrium, any chemical equilibrium between solid and dissolved states of a compound at saturation
  • Vapor–liquid equilibrium, where the rates of condensation and vapourization of a material are equal


Game theory[edit]


  • Social equilibrium, a system in which there is a dynamic working balance among its interdependent parts
  • Equilibrium moisture content, the moisture content at which the wood is neither gaining nor losing moisture
  • Equilibrium point, in mathematics, a constant solution to a differential equation
  • Reflective equilibrium, the state of balance or coherence among a set of beliefs arrived at by a process of deliberative mutual adjustment

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