Melting ice in liquid - diyAudio
Go Back   Home > Forums > Member Areas > The Lounge

The Lounge A place to talk about almost anything but politics and religion.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 25th June 2015, 09:25 PM   #1
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Default Melting ice in liquid

If you place an ice cube in each of two glasses, one with fresh water the other with salt water both at room temperature, will either melt the ice more quickly and why?

Do your own thinking, no Googling.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 25th June 2015, 09:34 PM   #2
diyAudio Member
 
Join Date: Mar 2014
I know the salt water will get colder and intuition tells me the salt water will melt the ice faster as it lowers the freezing point. After all salt is put on roads to prevent icing in wimpy countries like ours without real winters . But I know I have forgotten something from my chem lessons here so probably very wrong.

Will go google my ignorance now...
  Reply With Quote
Old 25th June 2015, 09:35 PM   #3
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
All: Please keep the findings to yourself after you look it up. There are suggestions on both sides of the argument out there but I believe only one correct answer. I plan to do the experiment later.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 25th June 2015, 09:37 PM   #4
diyAudio Member
 
Join Date: Mar 2014
Don't worry I will, which is why I googled after posting my thoughts. However I am not firing on all cylinders at the moment as new arrival in the family.
  Reply With Quote
Old 25th June 2015, 09:47 PM   #5
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

Without googling :

The transition temperature in the salt water is lower so the driving
thermodynamic difference is higher for salt water. Another way of
putting it is salinity will tend to equilibrium and the salinity delta
will tend to drive the melting process, by how much I don't know.

But the higher the salinity, the bigger the difference.

It will melt faster in salt water. I've no intention of looking it up.

rgds, sreten.
__________________
There is nothing more practical than a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 25th June 2015 at 09:55 PM.
  Reply With Quote
Old 25th June 2015, 09:50 PM   #6
diyAudio Member
 
cogitech's Avatar
 
Join Date: Jan 2011
Location: Kamloops, BC
Salt water has higher density, so should maintain its temperature better than fresh water under identical conditions; advantage - salt water. (EDIT: I was typing while sreten posted, but I think this goes hand in hand with his explanation, but in different words. )

Also, there is a principal (which I am forgetting the name of) which basically states that substances with higher salt content (whether sodium-based or other) actively "draw in" substances of lower salt content. This is why salt or salt water is often used to "draw infection out" of a wound or similar, because salt water is far more saline than our bodies. Likewise, the salt water would actively be "drawing in" the ice cube. I am pretty sure this is the major enabler of cellular osmosis, but it has been a long time since I studied biology.

Advantage salt water, but I am sure the official explanation is far more eloquent than what I just wrote.

Last edited by cogitech; 25th June 2015 at 09:57 PM.
  Reply With Quote
Old 25th June 2015, 09:59 PM   #7
jcx is offline jcx  United States
diyAudio Member
 
Join Date: Feb 2003
Location: ..
is the cube salt or fresh? same or different?
  Reply With Quote
Old 25th June 2015, 10:02 PM   #8
diyAudio Member
 
cogitech's Avatar
 
Join Date: Jan 2011
Location: Kamloops, BC
Quote:
Originally Posted by jcx View Post
is the cube salt or fresh? same or different?
Good question.

I was working under the assumption of a fresh ice cube.
  Reply With Quote
Old 25th June 2015, 10:03 PM   #9
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Quote:
Originally Posted by jcx View Post
is the cube salt or fresh? same or different?
Hi, I assumed the cube is fresh water, rgds, sreten.
__________________
There is nothing more practical than a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 25th June 2015 at 10:08 PM.
  Reply With Quote
Old 25th June 2015, 10:07 PM   #10
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Oh c'mon, what the heck is a salt water ice cube? Give your heads a gentle smack up the side and if
that doesn't work I have another suggestion.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Soldering iron - tip is melting jazko Equipment & Tools 32 23rd February 2011 03:01 PM
hifonics amplifier melting RCA cords anwaypasible Car Audio 21 8th March 2010 05:32 AM
HELP! my brain is melting lolojr1 Everything Else 17 30th January 2005 04:14 PM
HELP! Melting transformer fezz Solid State 12 21st July 2002 12:52 AM


New To Site? Need Help?

All times are GMT. The time now is 11:35 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2