Order and Disorder in Liquid Water: Investigating the Structure of H2O Molecules

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SUMMARY

The discussion centers on the structural properties of liquid water (H2O) and whether it exhibits ordered domains at room temperature. Participants debate the existence of significant hydrogen-bonded networks and the potential for translational symmetry within these domains. It is concluded that liquid water typically lacks a crystalline structure at room temperature, with the presence of voids or vacancies being non-deterministic. Temperature is identified as a critical factor influencing the size and nature of any ordered domains.

PREREQUISITES
  • Understanding of hydrogen bonding in water molecules
  • Familiarity with liquid state physics
  • Knowledge of crystallinity and translational symmetry
  • Basic concepts of molecular dynamics simulations
NEXT STEPS
  • Research the role of temperature in the structural properties of liquid water
  • Explore molecular dynamics simulations of water to visualize hydrogen bonding
  • Study the concept of voids and vacancies in liquid structures
  • Investigate the differences between crystalline and amorphous states in liquids
USEFUL FOR

Researchers in physical chemistry, materials scientists, and anyone studying the molecular structure of liquids, particularly those interested in the properties of water and its behavior under varying temperature conditions.

Hyo X
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Does liquid water have ordered structure?
I.e., are there significant domains of ordered H2O molecules that maintain crystallinity - translational symmetry - in liquid water at room temperature?
I guess this is essentially a hydrogen bonded network -
How big are these domains? Or are they mostly disordered, closely packed molecules without short-range or medium-range order? Is there a temperature dependence to domain size?

What determines if there are voids or vacancies or free molecules?
 
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Define "order" - how would you tell if it was present or not?
Liquid water is not normally modeled, at room temp, to have any crystalline structure at all.
The presence or otherwise of voids, vacancies, or free molecules is not normally deterministic ... but I suspect the terms you are using could use tightening: what is the context?

Something like this:
http://pubs.rsc.org/en/content/articlelanding/2013/cp/c3cp52271g#!divAbstract
 
The reason I ask is I found this diagram in a textbook and find it very curious -
Is this a realistic representation of water?

WaterStructure_Christian_Reichardt.jpg


The textbook is "Solvents and Solvent Effects in Organic Chemistry" by Christian Reichardt
The cited reference [9] is [9] R. A. Horne: The Structure of Water and Aqueous Solutions, in A. F. Scott (ed.): Survey of Progress in Chemistry 4, 1 (1968).
But I couldn't find a copy of this reference.

Thanks for your help/opinion
 
Define "realistic" :smile:

In some ways it is realistic, in some ways it is not.
 
I would guess this is not room temp. water. This looks like what I imagine freezing/thawing water to look like.
 
Definitely it must be a matter of temperature.
 

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