Settling the Hot vs Cold Water Debate: Exploring a Logical Explanation

In summary, the woman claimed that hot water freezes faster than cold water based on her observation of the ice trays in her home refrigerator. Her engineer husband called it nonsense, but she asked for a logical explanation. The phenomenon she observed is known as the Mpemba effect, where hot water can freeze faster than cold water due to its faster rate of heat loss. This is a commonly debated topic and there is a comprehensive explanation available in the provided link.
  • #1
Rocket_guy
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??
 
Physics news on Phys.org
  • #2
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
Hey .. thanks .. that was a nice explanation!
 

1. What is the "hot vs cold water debate"?

The "hot vs cold water debate" refers to the disagreement about whether it is better to use hot or cold water for various activities, such as washing hands, doing laundry, or drinking.

2. Why is this debate important?

This debate is important because the temperature of water can affect its properties and potential benefits or drawbacks. It can also impact our daily habits and routines.

3. What are the arguments for using hot water?

Some argue that hot water is more effective for killing bacteria and cleaning, as well as providing a more comfortable temperature for certain activities, such as showering or washing dishes.

4. What are the arguments for using cold water?

On the other hand, others argue that cold water can save energy and money, as well as being better for preserving the natural oils in our skin and hair. Additionally, cold water may be safer for drinking, as hot water can potentially leach harmful chemicals from pipes.

5. Is there a logical explanation for the hot vs cold water debate?

While there is no definitive answer, studies have shown that the temperature of water may not make a significant difference in terms of cleaning or health benefits. Ultimately, the best option may depend on personal preference and the specific circumstances of each activity.

Similar threads

Replies
6
Views
3K
  • Chemistry
Replies
1
Views
2K
  • Introductory Physics Homework Help
Replies
11
Views
2K
  • General Discussion
Replies
5
Views
2K
  • Biology and Chemistry Homework Help
Replies
5
Views
4K
Back
Top