Which of the following is not a state function of a system?
Correct answer: C. Heat
- A. Temperature
- B. Internal energy
- C. Heat
- D. Pressure
Explanation
Heat (Q) is not a state function. It depends on the path taken during a process, whereas state functions like temperature, internal energy, and pressure only depend on the current state of the system and are independent of the path taken to reach that state.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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