JEE Advanced · PhysicsEasy
Which of the following thermodynamic variables is a state function?
- A.Work done
- B.Heat
- C.Internal energy
- D.Power
Show correct answer & step-by-step solution
Correct answer: C — Internal energy
Solution
- A state function is defined as a thermodynamic property that depends solely on the initial and final states of a system.
- Path-dependent quantities, such as work and heat, rely on the specific process taken to transition between states.
- Internal energy () is a fundamental property of a system that is determined only by its current state variables.
- Therefore, internal energy is classified as a state function, while work and heat are not.
- Hence the answer is (C).
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