Freeze

Freeze

Science

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Walk your Faith

USA

Joined
24 May 04
Moves
157824
07 Mar 15

What freezes faster hot water, cold water, why?

w

Joined
21 Nov 14
Moves
805
07 Mar 15

Originally posted by KellyJay
What freezes faster hot water, cold water, why?
Ice boils faster than room temp. water..uses less energy...

s
Fast and Curious

slatington, pa, usa

Joined
28 Dec 04
Moves
53223
07 Mar 15

Originally posted by woadman
Ice boils faster than room temp. water..uses less energy...
Take a look at this:
http://www.school-for-champions.com/science/heat_ice_steam.htm#.VPtCZfnF-sQ

0,1,1,2,3,5,8,13,21,

Planet Rain

Joined
04 Mar 04
Moves
2702
07 Mar 15

Originally posted by KellyJay
What freezes faster hot water, cold water, why?
Cold water freezes faster. Why? Before hot water can freeze it first has to become cold water.

D
Losing the Thread

Quarantined World

Joined
27 Oct 04
Moves
87415
08 Mar 15

Originally posted by Soothfast
Cold water freezes faster. Why? Before hot water can freeze it first has to become cold water.
I made that mistake over in Spirituality. There's something called the Mpemba effect, first noticed by a Tanzanian school student called Erasto Mpemba, there are various ideas as to why this should be so. The latest theory is that it is something to do with hydrogen bonds. The effect is not consistent. There is no doubt about it, water is weird stuff.

http://en.wikipedia.org/wiki/Mpemba_effect

F

Joined
11 Nov 05
Moves
43938
08 Mar 15

Originally posted by KellyJay
What freezes faster hot water, cold water, why?
You cannot freeze hot water at all. Because when water freezes it is not longer hot.

Not in normal atmosphere it doesn't.

Joined
18 Jan 07
Moves
12466
08 Mar 15

Originally posted by DeepThought
I made that mistake over in Spirituality. There's something called the Mpemba effect, first noticed by a Tanzanian school student called Erasto Mpemba, there are various ideas as to why this should be so. The latest theory is that it is something to do with hydrogen bonds. The effect is not consistent. There is no doubt about it, water is weird stuff.

http://en.wikipedia.org/wiki/Mpemba_effect
"The Mpemba Effect, named after Erasto Mpemba, is the observation that, in some circumstances".

Quite.

In general, though, cold water freezes faster than hot.