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**Ask a monkey a physics question thread**

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  1. 05-30-2017 03:01 PM #1
    OngBonga's Avatar
    OngBonga
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    Introduce energy? There is already a shit ton of energy in the freezer. It's a couple of hundred degrees Kelvin in there. When a molecule of ice sublimates, then it takes heat from the air... the air cools down a fraction.

    Humidity plays a role because once the air is saturated, no more evaporation can take place. I assumed evaporation was zero, and therefore humidity is also zero, in a freezer. Seems like I'm wrong.

    So long as relative humidity is lower than 100%, then evaporation can take place. How much depends on temperature, pressure and relative humidity. My freezer's RH will be 100%, because there is no process which is removing the moisture from the air which I add when I open the door. At 100% RH, no evaporation takes place. Your freezer will have a lower RH, fuck knows how much lower but it's under 100%. Thus, evaporation, and indeed sublimation, can take place, because RH is <100%, and there is energy in the air. The molecules of vapour will eventually come into contact with the coil, and be removed from the system, thus reducing RH and allowing further sublimation.

    If ice loss is a problem, you could simply seal them in something air tight. Problem solved.
    Quote Originally Posted by wufwugy View Post
    ongies gonna ong
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  2. 05-30-2017 03:07 PM #2
    BananaStand
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    Quote Originally Posted by OngBonga View Post
    If ice loss is a problem, you could simply seal them in something air tight. Problem solved.
    Crawl into your freezer and shut the door. Let me know if it's air-tight
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  3. 05-30-2017 03:15 PM #3
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    OngBonga
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    Quote Originally Posted by BananaStand View Post
    Crawl into your freezer and shut the door. Let me know if it's air-tight
    Things go over your head easily, don't they?

    Yes a freezer is air tight. However, the air inside the freezer is coming into contact with a heated coil. You need to isolate the ice cubes from air that is coming into contact with this coil.
    Quote Originally Posted by wufwugy View Post
    ongies gonna ong
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  4. 05-30-2017 06:14 PM #4
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    MadMojoMonkey
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    Quote Originally Posted by OngBonga View Post
    If ice loss is a problem, you could simply seal them in something air tight. Problem solved.
    I endorse this experiment.

    Place an ice tray in a ziplock bag or equivalent and another which is not sealed or "normal."

    Wait a while (however long you would normally notice a loss of ice).

    Compare results.

    Repeat for fun and excitement!
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