In thermodynamics, state variable is a variable that is measure of the state of the system or process. [1] State variables are fully determined by the values at present (path independent variables) and do not depend on the previous history of the system (path dependent variables). [2]

See also
Path function
State function

References
1. Reiss, Howard. (1996). Methods of Thermodynamics (pg. 4). Dover.
2. Linder, Bruno. (2004). Thermodynamics and Introductory Statistical Mechanics (pg. 8). Wiley.

External links
State variable – Wikipedia.

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