Freezing water?

  • Thread starter Rocket_guy
  • Start date
  • #1
37
0
1. A woman informs her engineer husband that "hot water will freeze faster than cold water". He calls this statement nonsense. She answers by saying that she had actually timed the freezing process for ice trays in the home refrigerator and found that the hot water does indeed freeze faster. As a friend, you are asked to settle the argument. Is there a logical explanation for the woman's observation?



2. NONE



3. Is it becoz of the faster rate of heat loss from hot water as compared to cold water? But water freezes after a certain temeprature .. the hot water will first cool to lower temperature as of the cold water then freeze thus taking more time! Or is it that the surface temp. of the hot water will fall faster and thus may seem that the ice was made faster out of the hot water? Any ideas??
 

Answers and Replies

  • #2
Hootenanny
Staff Emeritus
Science Advisor
Gold Member
9,621
6
What you are referring to is commonly known as the Mpemba effect. I'm referring you to an external FAQ, not because I can't be bothered to answer your question, but the link discusses the topic comprehensively and you'll get a lot more out of it than if I were to type a few words here.

http://math.ucr.edu/home/baez/physics/General/hot_water.html
 
  • #3
37
0
Hey .. thanx .. that was a nice explanation!!
 

Related Threads on Freezing water?

  • Last Post
Replies
4
Views
365
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
13
Views
3K
Replies
3
Views
9K
Replies
5
Views
2K
Replies
3
Views
1K
  • Last Post
Replies
13
Views
4K
Replies
29
Views
985
  • Last Post
Replies
2
Views
6K
Top