Questions about the Point Function (Thermodynamics)

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Discussion Overview

The discussion revolves around the nature of work and heat transfer in thermodynamics, particularly in relation to point functions and path functions within closed systems. Participants explore concepts related to adiabatic processes, constant volume, and constant pressure processes.

Discussion Character

  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether work done in an adiabatic system can be considered a point function, given that energy is a point function and net heat transfer is zero.
  • Another participant defines a point function as being independent of the path and dependent only on the endpoints, suggesting that the question of whether something is a point function is not applicable when fixing the path.
  • There is a repeated assertion that work is always a path function, regardless of the nature of the process, indicating a belief that work cannot be treated as a point function.

Areas of Agreement / Disagreement

Participants express differing views on the classification of work as a point function or path function, with no consensus reached on the implications of adiabatic processes or the nature of work in thermodynamics.

Contextual Notes

The discussion includes assumptions about the definitions of point and path functions, as well as the specific conditions under which work and heat transfer are analyzed, which remain unresolved.

Rahulx084
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We know from first law of thermodynamics for a closed system that ##dE##=##\delta Q## -##\delta W## , my question is that for a closed adiabatic system net heat transfer =0 this mean net change in energy = work done , does that mean for an adiabatic system work done is a point function as energy is a point function? If yes , we know that for a constant volume process heat transfer is equal to change in internal energy,does that mean for every constant pressure process for a closed system heat transfer is a point function?
 
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A point function is, by definition, an entity that is independent of path, and depends only on the two end points. So fixing the path and asking whether something is a point function doesn't make a whole lot of sense (to me).
 
That means for any process irrespective of its nature work is always going to be path function, Right?
 
Rahulx084 said:
That means for any process irrespective of its nature work is always going to be path function, Right?
It means that, for any two end states, work is always going to be a path function.
 
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