Which of these is NOT a state function?
Answer and explanation
Correct answer: C. Work
- Step 1: A state function is a thermodynamic property that depends solely on the current macroscopic state of a system, irrespective of the transformation path.
- Step 2: Thermodynamic variables including enthalpy (), entropy (), and internal energy () are exact differentials and true state functions.
- Step 3: In contrast, work () and heat () are path functions whose values depend specifically on the mechanism and route by which the system changes state.
Answer
Work.
Why not the others: Entropy is a fundamental thermodynamic state function (); Enthalpy is a state function defined as ; Internal energy is a state function representing total kinetic and potential molecular energy ().
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