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Latch Bare

Posted on Friday, November 26, 2010 in Electrical Equipment

Why does ice 'stick' to bare skin?

No, I'm not dumb enough to lick a frozen telephone pole (actually, no, that's a debatable statement).

But I do notice that when I'm taking ice out of the ice-tray, it latches itself to my fingers and refuses to let go.
Ya know, I could ask this in the Science section of the site but I'm really not in the mood to get chemical equations thrown at me.

Your freezer is at a temperature of -18 degrees C. That is 18 degrees below the freezing point of water. Any moisture on your skin is immediately frozen by this cold ice, and this newly formed ice serves as the attachment point.

If you take out ice and allow it to warm up to 0 degrees C (i.e, just when it begins to melt), your skin will NOT stick to it because it is not cold enough to freeze the moisture on your skin.

^ The link above basically says the same thing but in chemistry language.

There is no chemistry involved here. Simple common sense.

The exact temperature at which ice will not stick to your skin depends on the room temperature, your skin temperature and the amount of moisture on your skin.
An object (ice or telephone pole) has to be much colder than freezing in order to freeze moisture on other objects (skin).

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