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Everything about State function

Function describing equilibrium states of a system

In the thermodynamics of equilibrium, a state function, function of state, or point function for a thermodynamic system is a function relating several state variables or state quantities that depend only on the current equilibrium thermodynamic state of the system, not the path which the system has taken to reach that state. A state function describes equilibrium states of a system, thus also describing the type of system. A state variable is typically a state function so the determination of other state variable values at an equilibrium state also determines the value of the state variable as the state function at that state. The ideal gas law is a good example. In this law, one state variable is a function of other state variables so is regarded as a state function. A state function could also describe the number of a certain type of atoms or molecules in a gaseous, liquid, or solid form in a heterogeneous or homogeneous mixture, or the amount of energy required to create such a system or change the system into a different equilibrium state. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: State functionA 5-minute orientation
  2. Skim a recent paper: Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD): A State-of-the-Art ReviewInfluential work since 2022
  3. Pick up a classic book: Results ActThe most-reprinted book on the subject
  4. Read the landmark paper: State function based flash specificationsCited 130 times
  5. Go sideways: Thermodynamic potentialA closely related topic
  6. Go sideways: Thermodynamic equationsA closely related topic

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