Point Function vs. Path Function
1 / 10
In a thermodynamic process, which property’s change is path-independent?
Explanation: Internal energy is a point function, so its change depends only on initial and final states, not the path.
2 / 10
Which pair includes only point functions?
Explanation: Pressure and temperature are point functions, defined by the state. Heat and work are path functions
3 / 10
Why is heat considered a path function?
Explanation: Heat depends on the process (e.g., different heat in isothermal vs. isobaric processes), so it’s a path function.
4 / 10
The entropy of a system is:
Explanation: Entropy depends only on the system’s state, making it a point function, unlike work or heat.
5 / 10
Which is NOT a point function?
Explanation: Heat transfer is a path function, varying with the process. Entropy, temperature, and specific volume are point functions.
6 / 10
 During gas expansion, which remains a point function?
Explanation: Pressure is a point function, with a definite value at any state, independent of the expansion process.
7 / 10
 Which property varies with the thermodynamic process?
Explanation: Work is a path function, as its value depends on the process (e.g., isothermal vs. adiabatic compression).
8 / 10
 A property with a definite value at a system’s state is:
Explanation: Point functions, like temperature or density, are defined by the system’s state and measurable at a single point.
9 / 10
Which of these is a path function?
Explanation: Heat is a path function because its value depends on the process (e.g., how energy is transferred), not just the state.
10 / 10
What defines a point function in thermodynamics?
Explanation: Point functions, like temperature or pressure, have a fixed value at a specific state, regardless of the process taken
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