Boiling Ice Water

[rblakemore]

Is it possible to boil ice water?!?!?
Yes!!

Here is my chamber during the first vacuum test, and, I am boiling ice water. This is a actually a short video, and, I do not see how to upload videos. So the picture is not great, but, the ice water is boiling.
How do I upload videos???

 

[GaryT45]

The lower the pressure, the lower the boiling point.
At 14.69 PSI, the boiling point is 212 F
At 1 PSI, the boiling point is 102 F
At 100 PSI, the boiling point is 328 F

 

[its_virgil]

Was it actually hot and boiling? Or, were the bubbles just dissolved air coming out of solution appearing as if the water were boiling? A bit confused.
Do a good turn daily!
Don

 

[NittanyLion]

Here's a reference to what vacuum you would need to boil water at what temperature. I think you are seeing bubbles.

 

[jeff]

Is it possible to boil ice water?!?!?
Yes!!

Here is my chamber during the first vacuum test, and, I am boiling ice water. This is a actually a short video, and, I do not see how to upload videos. So the picture is not great, but, the ice water is boiling.
How do I upload videos???

Upload your video to YouTube and then you can link to it here with our special YouTube tags. Put the video tag (not the whole URL to the video) between the YT tags.

 

[mhbeauford]

Yes, using high vacuum and an ultra cold condenser (-40 F) you can even sublimate frozen water. It's called freeze drying. As a student in college I worked in a dairy foods research lab and we did this very often with milk to dry it without harming the enzymes that were used for further analysis. Water liquid or frozen has a vapor pressure even if small, anytime the pressure is lower than the vapor pressure the mater molecules will migrate.