Talk:Liquid

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To-do list for Liquid:

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Here are some tasks you can do: Requests: Diagrams: A diagram of how the configuration of molecules/atoms differs for the solid, liquid, and gas phases. See Elastic collision for an animated (!) example. A similar diagram could show how evaporation and freezing work (or could be added to those articles). A diagram showing how pressure changes with depth would be enlightening. Expand: An explanation of what makes a fluid and a liquid different would be helpful. An "examples" section would be quite educational for basic readers. An "applications" section would be interesting, mentioning things like solvents, coolants, and lubricants. Solutions and colloids should be mentioned.

Contents 1 Robinh 2 The article is very misleading 3 Glass is supercooled 4 Please someone fix the opening paras 5 Image requests 6 Expansion requests 7 WikiProject class rating

[edit] Robinh

The opening paragraph defining liquid cannot be right as it would admit a gas as being a liquid (by Boyle's law).

I expect that the definition of liquid is ultimately subjective, but I would suggest, as a first draft, the following:

"a liquid is a fluid whose density is approximately independent of pressure"

This definition is not very good, because it does not define what "approximately" means, and it does not define what pressure range should be considered (water doubles its density under a pressure of about 20000 atmospheres).

Robinh 22:35, 16 Jan 2004 (UTC)

[edit] The article is very misleading

A liquid is far more akin to a solid than to the gas that this suggests. The diagram shows the molecules of a liquid as being separate. They actually hold together at much the same separation as in a solid, and spend much of the time bound to adjacent molecules just as they would in a solid. Thermal energy breaks these bonds, and the molecules then slide past each-other until tow molecules of suitable energy and orientation rejoin. This process is at the heart of liquid viscosity. PhysicistQuery 12:21, 31 August 2007 (UTC)Physicistquery

[edit] Glass is supercooled

The sentence on supercooling is misleading. The following is correct.

• Glass is supercooled (At least window glass is, but some atactic polymers are not)
• Glass is not a liquid

You can combine the two above sentences to get "glass is not a supercooled liquid". However I beleive that most readers will misread it and and conclude the following "Glass is not supercooled". This conclusion is wrong

Anyway the difference between liquid and solid is in the section about the glass transition temperature.

- Yes I have a Ph.D. in glass physics.

Contributed by:Patrick Louie E.Reyes —Preceding unsigned comment added by 130.225.221.142 (talk • contribs)

[edit] Please someone fix the opening paras

Opening paras have been changed recently and it doesn't read well and its full of typos. —Preceding unsigned comment added by 84.13.73.186 (talk • contribs)

I did a quick sweep through, though in general I agree with the person who rated this article as "atrocious" (even though I reverted it for the bot's sake!). We'll have to give this article some serious attention, there's so much more to be covered. Thanks, Walkerma 03:44, 27 August 2006 (UTC)

[edit] Image requests

The following illustrations would be helpful to illustrate some of the points made:

• A diagram of how the configuration of molecules/atoms differs for the solid, liquid, and gas phases. See Elastic collision for an animated (!) example.

made this one, contact me if it isnt correct Yupi666 21:33, 20 June 2007 (UTC)

• A similar diagram could show how e.g. evaporation and freezing work (or could be added to those articles).
• A diagram showing how pressure changes with depth would be enlightening.

-- Beland 07:26, 7 April 2007 (UTC)

Moved to top. ffm ✎talk 19:40, 10 April 2007 (UTC)

[edit] Expansion requests

Please help improve this article or section by expanding it. Further information might be found on the talk page or at requests for expansion. (April 2007)

• An explanation of what makes a fluid and a liquid different would be helpful.
• An "examples" section would be quite educational for basic readers.
• An "applications" section would be interesting, mentioning things like solvents, coolants, and lubricants.
• Solutions and colloids should be mentioned.

-- Beland 07:23, 7 April 2007 (UTC)

Moved to top. ffm ✎talk 19:40, 10 April 2007 (UTC)

• A description of the nature of the forces between molecules in a liquid would be good. --cfp 11:20, 21 July 2007 (UTC)
• Any addition on solutions could usefully describe or explain the effects on the solvent - eg change of volume. Walter (talk) 16:27, 28 April 2008 (UTC)

[edit] WikiProject class rating

This article was automatically assessed because at least one WikiProject had rated the article as start, and the rating on other projects was brought up to start class. BetacommandBot 09:58, 10 November 2007 (UTC)