Why Does Water Behave Anomalously?

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Discussion Overview

The discussion focuses on the anomalous behavior of water, particularly its properties related to temperature changes, such as density variations and hydrogen bonding. Participants explore the scientific reasons behind these behaviors and inquire about the possibility of altering the temperature range at which these phenomena occur. The conversation includes both conceptual and technical aspects of water's behavior.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested
  • Homework-related

Main Points Raised

  • Some participants question the meaning of "anomalous" as used by the original poster (OP) and suggest it may have been a typo.
  • One participant requests clarification from the OP regarding what specific anomalous behavior they are referring to, noting that water generally behaves like other liquids.
  • The OP clarifies that they meant "anomalous" and asserts that their question is not homework-related.
  • Participants discuss specific behaviors of water, such as its density changes from 4°C to 0°C and the role of hydrogen bonding in the crystallization process as water freezes.
  • There is a humorous exchange about the concept of hydrogen bonds, with some participants making light-hearted references to popular culture.
  • One participant expresses gratitude for a detailed description of water's molecular behavior and poses a follow-up question about whether the temperature range for these phenomena can be altered.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specific anomalous behavior being discussed, and there are multiple interpretations of the OP's question. The discussion remains unresolved regarding the potential for changing the temperature range of these phenomena.

Contextual Notes

Some assumptions about the nature of water's behavior and the definitions of terms like "anomalous" are not fully clarified, leading to varying interpretations among participants.

djsourabh
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What is the exact scientific reason behind anamalous behavour of water?
Can the temperature range at which this happens be changed?
do any other substances also behave anamalously?
 
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mmm...what's anomalous?
 
No, no, the OP clearly said anamalous, whatever that is.
 
He did say anamalous but that was probably just a typing error. He meant to write anomalous.
 
He wrote anamalous three times, it is not a typo.

To OP: please elaborate. In most cases water behaves as every other liquid. Sometimes it doesn't, but you need to explain what you mean if you want to get any help.

Besides, it looks like a HW question to me...
 
Sorry for typing mistake.
I meant ' anomalous' only.
It's not a HW question.
 
So what are you talking about Sourabh?
Large specific heat, expansion while freezing, inertness, or something else?
 
The weird behaviour at 4 C to 0 C .
 
Well, water is composed of three atoms two hydrogen and one oxygen. So a molecule looks likes this:
attachment.php?attachmentid=61616&stc=1&d=1378700879.gif

-When the temperature decreases the molecules start slowing down.
-This causes the volume to decrease and density to increase until 4°C while its still in liquid state.
-After this the molecules start crystallizing in a cage like structure by hydrogen bonding. Hydrogen bonding is a weak molecular interaction between the oxygen of one molecule and Hydrogen of another.
-In the crystallization process the density decreases and volume increases as the H-bonds push molecules apart to maintain a stable crystal lattice.
-The differences can be seen in this image [left is liquid and right is ice]:
320px-Liquid-water-and-ice.png

The temperature and pressure relationship of water is given by:
attachment.php?attachmentid=61615&stc=1&d=1378699692.gif
 

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  • #10
Bonds, bonds - Hydrogen bonds!
 
  • #11
ModusPwnd said:
Bonds, bonds - Hydrogen bonds!

Bond... hydrogen bond.
Shaken, not stirred.
 
  • #12
Drakkith said:
Bond... hydrogen bond.
Shaken, not stirred.
Nooo, supercool it and then shake it! The drink shall turn to Ice cream...
https://www.youtube.com/watch?v=DpiUZI_3o8s

The actual drink is a Vesper martini, it went like this:
"A dry martini," Bond said. "One. In a deep champagne goblet."
"Oui, monsieur."
"Just a moment. Three measures of Gordon's, one of vodka, half a measure of Kina Lillet. Shake it very well until it's ice-cold, then add a large thin slice of lemon peel. Got it?"
 
  • #13
Enigman said:
Well, water is composed of three atoms two hydrogen and one oxygen. So a molecule looks likes this:
attachment.php?attachmentid=61616&stc=1&d=1378700879.gif

-When the temperature decreases the molecules start slowing down.
-This causes the volume to decrease and density to increase until 4°C while its still in liquid state.
-After this the molecules start crystallizing in a cage like structure by hydrogen bonding. Hydrogen bonding is a weak molecular interaction between the oxygen of one molecule and Hydrogen of another.
-In the crystallization process the density decreases and volume increases as the H-bonds push molecules apart to maintain a stable crystal lattice.
-The differences can be seen in this image [left is liquid and right is ice]:
320px-Liquid-water-and-ice.png

The temperature and pressure relationship of water is given by:
attachment.php?attachmentid=61615&stc=1&d=1378699692.gif

Thank you for such agood description.
My next query is "can the temperature range at which this phenomena occurs be changed by any means?"
 

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