Talk:Temperature–entropy diagram

Physics Low‑importance

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Chemistry Low‑importance

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Disambiguation Required

T-S diagram is redirected here. Temperature salinity diagram is also abbreviated to T-S diagram, but there's not a disambiguation page but a "for other uses" template linking to Tanabe-Sugano diagram. I am not good at editing Wikipedia especially in English, wish somebody can fix it. 日暮卯白 (talk) 12:13, 12 December 2018 (UTC)[reply]

I changed the redirect to a disambiguation page, is this what you expected? Ariadacapo (talk) 16:32, 12 December 2018 (UTC)[reply]

Yes. Thanks.日暮卯白 (talk) 03:33, 13 December 2018 (UTC)[reply]

Requested move 12 December 2018

The following is a closed discussion of a requested move. Please do not modify it. Subsequent comments should be made in a new section on the talk page. Editors desiring to contest the closing decision should consider a move review after discussing it on the closer's talk page. No further edits should be made to this section.

The result of the move request was: moved. ErikHaugen (talk | contribs) 19:02, 27 December 2018 (UTC)[reply]

Temperature vs. specific entropy diagram → Temperature-entropy diagram – Per WP:UCRN. Temperature-entropy diagram is the general, commonly-used name of this type of diagram in every Thermodynamics textbook I know. The current title is overly specific and cumbersome. Ariadacapo (talk) 16:39, 12 December 2018 (UTC)--Relisted. –Ammarpad (talk) 06:42, 20 December 2018 (UTC)[reply]

The above discussion is preserved as an archive of a requested move. Please do not modify it. Subsequent comments should be made in a new section on this talk page or in a move review. No further edits should be made to this section.

Move image description into article

The description of the second image in the article is to long and contains a lot of what should be in the article. I think it should be moved accordingly. --LonleyGhost (talk) 19:32, 15 December 2020 (UTC)[reply]

Heat engine: clockwise or counterclockwise?

I confess to some confusion about the sentence "If the cycle moves in a clockwise sense, then it is a heat engine that outputs work;".

The corresponding claim for the pV diagram is fine, since work done is obviously the integral of dQ = pdV, by elementary Newtonian mechanics.

But the high temperature in the pV diagram is where entropy dS is dQ/T, whence more entropy is being extracted from the working fluid at the lower temperature than is being input at the higher temperature.

Wouldn't that entail the cycle moving counterclockwise?

If the entropy is not that of the working fluid but of the two reservoirs, then it makes sense.

But otherwise I can't make head or tail of it.

I need this for the thermodynamics of my synthetic trees, which need to get this reasoning right. Vaughan Pratt (talk) 06:40, 19 February 2025 (UTC)[reply]