What causes plastic container with water to “sweat” out water after being frozen and unfreezing?

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If a person puts a gallon of water *(of a plastic container)* in the freezer, then take it out later, the water begins to “sweat” through the plastic and some of the water gets wasted, what causes this to happen and does that mean that plastic is getting in the water?

EDIT: *Thank you everybody! I wasn’t going to ask this because I thought it would be a stupid question, but when I did a search online, I couldn’t find anything specific to “plastic sweating water after being cold”. You all helped me realize that I was looking at the situation wrong and it had nothing to do with the plastic itself getting colder or hotter and sweating water but the moisture of air on the plastic being cooled and then warmed up into water droplets.*

In: Physics

8 Answers

Anonymous 0 Comments

The “sweat” is not from inside the container, but from the air outside the container.

The cold surface causes the humidity in the air to condense into liquid water.

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