Why does warm water freeze faster than cold water?

Jump to Last Post 1-6 of 6 discussions (10 posts)
  1. Astra Nomik profile image54
    Astra Nomikposted 6 years ago

    Why does warm water freeze faster than cold water?

  2. profile image0
    JThomp42posted 6 years ago

    The hot water is more likely to be supercooled. This means that the hot water's temperature is more likely to cool to temperatures below zero degrees Celsius. In the cold non-supercooled water, ice crystals form and float to the top, forming a sheet of ice over the top of the water, creating an insulating layer between the cooler air and the water. This ice sheet also stops evaporation. In the hot water that has become supercooled (thus, no longer hot) the water, when it does freeze, freezes throughout, creating more or less of a slush before freezing solid.

    Why is hot water more likely to be supercooled? Because hot water is less likely to contain tiny gas bubbles. Gas bubbles form from dissolved gasses as the water cools. When the hot water was heated, these dissolved gasses may have been driven out. In cold water, ice crystals use the tiny bubbles as starting points for formation (in physics, we call them nucleation points). But in the hot water, there are no bubbles, so there aren't as many starting points for the ice crystals.

    Dissolved gasses also lower the freezing point. Since heated gas is less likely to contain dissolved gasses, it's more likely to freeze first.

    1. Astra Nomik profile image54
      Astra Nomikposted 6 years agoin reply to this

      Wow, what a great explanation, JThomp42...  smile

    2. profile image0
      JThomp42posted 6 years agoin reply to this

      Thank you!!

  3. tussin profile image57
    tussinposted 6 years ago

    it actually doesn't freeze faster than cold water and this is a common misperception that you can disprove experimentally at home.  Get equal sized containers and fill one with hot water and one with cold water. Place them both in the freezer away from each other and check on them periodically.  The container with cold water should solidify slightly earlier than the one with hot water. 

    I've done it and I can tell you that the container of hot water does not become ice sooner than the cold water.

    The reason why people say the hot water container will freeze faster is because initiially the *rate* of cooling is higher for the hot water container.  but once it cools sufficiently, it freezes at the usual rate.

    What JThomp42 said about the dissolved gasses is true.  But as the hot water cools, more gasses from air get dissolved in it, making it just like the cold water.

    1. Astra Nomik profile image54
      Astra Nomikposted 6 years agoin reply to this

      This sounds interesting..... smile

  4. livingsta profile image96
    livingstaposted 6 years ago
    1. Astra Nomik profile image54
      Astra Nomikposted 6 years agoin reply to this

      Thank you for the links... they are awesome... smile

  5. Teylina profile image60
    Teylinaposted 6 years ago

    I CANNOT ANSWER; however, I know six people (two of whom are "genius" level, and one Russian chemistry Ph.D. who sound just like JThomp, so I go w/him Glad livingsta remembers something! I have heard some of Tussin's points, but I also heard and saw them dispelled.
    ME??  I could care less.  All I know about freezing water is it can kill you or save your life, but if it is already frozen, all you gotta do is bust it up, stick in a warm can of beer, and in 5 min, 3 sec. it's the perfect cold to drink!  A ten people, 10 answer question

  6. daskittlez69 profile image73
    daskittlez69posted 6 years ago

    Basically when the water was heated it dissolved all over the tiny gas bubbles that were in the water. Because of this, ice crystals can not form and float to the top like in cold water.  So instead of freezing from the top down the water would freeze everywhere.

 
working

This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

Show Details
Necessary
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
Features
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Marketing
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Statistics
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)