 ##  [Helmholtz Free Energy](/helmholtz-free-energy) 

  ##  [Helmholtz Free Energy](https://natural.quantumdictionary.io/helmholtz-free-energy-0) 

  
 [![Natural & Formal Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Natural%20%26%20Formal%20Sciences.png.webp?itok=2kCDRVQv)](/topic-specific-dictionaries/natural-formal-sciences)


**Natural &amp; Formal Sciences Dictionary**

 
Definition

A thermodynamic potential defined as A = U − TS (internal energy minus temperature times entropy) that characterizes the equilibrium of closed systems at constant temperature and volume.