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Definition of State function

State function Definition from Science & Technology Dictionaries & Glossaries
General Chemistry Glossary
A property that depends only on the condition or "state" of the system , and not on the path used to obtain the current conditions. Energy, enthalpy, temperature, volume, pressure, and temperature are examples of state functions; heat and work are examples of non-state functions.
State function Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
In thermodynamics, a state function, function of state, state quantity, or state variable is a property of a system that depends only on the current, equilibrium state of the system. State functions thus do not depend on the path by which the system arrived at its present state. A state function describes the equilibrium state of a system. For example, internal energy, enthalpy, and entropy are state quantities because they describe quantitatively an equilibrium state of a thermodynamic system, irrespective of how the system arrived in that state.

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