Talk:Q900231
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Autodescription — work (Q900231)
description: energy transfer, or its amount (& direction), in a thermodynamic process due to macroscopic factors external to a thermodynamic system
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- Report on constraint conformation of “work” claims and statements. Constraints report for items data
For help about classification, see Wikidata:Classification.
- Parent classes (classes of items which contain this one item)
- work (Q900231)
- work (Q42213)
- energy transfer (Q15211908)
- physical quantity (Q107715) (⁋)→
- energy (Q11379)
- →(⁋) physical quantity (Q107715)
- work (Q42213)
- work (Q900231)
- Subclasses (classes which contain special kinds of items of this class)
- ⟨
work⟩ on wikidata tree visualisation (external tool)(depth=1) - Generic queries for classes
- See also
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{{Item documentation}}.
Thermodynamic work is not a subclass of mechanical work -- it is the other way around.
[edit]All mechanical work is thermodynamic work but thermodynamic work is defined more broadly as amt of energy transferred by any means other than heat or transfer of matter. For example the process of charging a battery performs some thermodynamic work (aside from some heat losses) but does not perform any mechanical work. DavRosen (talk) 17:42, 26 January 2017 (UTC)
- But may be Q42213 refers not only to mechanical but all kind of works. Look at the most sitelinks. --Infovarius (talk) 14:28, 27 January 2017 (UTC)
- Are you saying there is a third meaning of work besides mechanical work and thermodynamic work? The "amount of energy required or provided by the application of forces through a displacement" is the definition of mechanical work and the present item of this discussion *is* a broader definition that includes all kinds of work. DavRosen (talk) 02:09, 29 January 2017 (UTC)
- Thermodynamiс work consists of many elementary works of all particles in a medium. So it is subclass of mechanical work. --Infovarius (talk) 16:02, 30 January 2017 (UTC)
- Are you saying there is a third meaning of work besides mechanical work and thermodynamic work? The "amount of energy required or provided by the application of forces through a displacement" is the definition of mechanical work and the present item of this discussion *is* a broader definition that includes all kinds of work. DavRosen (talk) 02:09, 29 January 2017 (UTC)
- In the field and methodology of thermodynamics (not in physics in general in the most fundamental sense like you're describing), "work" is defined as a process function, meaning it describes the macroscopically-measurable aspects of a thermodynamic process, and quite intentionally does not refer to the "microscopic work" you're describing. But you've made me realize that neither is a subclass of the other, so I've added Q28555555 "macroscopic mechanical work", which is a subclass of both mechanical work and thermodynamic work. DavRosen (talk) 21:32, 30 January 2017 (UTC)
- I can't get new item... Can you give an example of thermodynamic work which is not Q28555555? --Infovarius (talk) 11:57, 1 February 2017 (UTC)
- I believe you're looking for examples of non-mechanical forms of thermodynamic work. See http://en.wikipedia.org/wiki/Work_(thermodynamics)#Non-mechanical_forms_of_work which says "In thermodynamics, non-mechanical work is to be contrasted with mechanical work that is done by forces in immediate contact between the system and its surroundings." and gives examples at the end of the section. I had thought that mechanical work was a subclass of thermodynamic work (because there are non-mechanical forms of work) and you had thought the opposite (because you believed that all thermodynamic work was ultimately mechanical), but your point made me realize that neither is true, but that the item "macroscopic mechanical work" is a subclass of both mechanical work and thermodynamic work. DavRosen (talk) 15:37, 1 February 2017 (UTC)
- I can't get new item... Can you give an example of thermodynamic work which is not Q28555555? --Infovarius (talk) 11:57, 1 February 2017 (UTC)
- In the field and methodology of thermodynamics (not in physics in general in the most fundamental sense like you're describing), "work" is defined as a process function, meaning it describes the macroscopically-measurable aspects of a thermodynamic process, and quite intentionally does not refer to the "microscopic work" you're describing. But you've made me realize that neither is a subclass of the other, so I've added Q28555555 "macroscopic mechanical work", which is a subclass of both mechanical work and thermodynamic work. DavRosen (talk) 21:32, 30 January 2017 (UTC)