I recently purchased a Vacmaster VP215C chamber sealer, and have noticed that when I place a small container of water into the chamber, and pull a vacuum for just over 25 seconds, the water begins to boil. This is very well understood, and also very interesting to watch.
My question is:
If I were to put a small mason jar into the chamber, half filled with water, and the lid loosely placed on top, and then pull a vacuum until well after the water begins to boil - and then hit the cancel button to force the air back into the chamber, if enough of the vacuum remains in the jar as the lid is sucked down, will the water continue to boil?
I tried it with a hermetic jar, and although the water boiled, as soon as the sealer stopped, and let the air back in, the jar did seal up but the water stopped boiling.
Was this because water will not continue to boil unless the vacuum is increasing, or is it because when the air was let back into the chamber, the vacuum inside the jar was lessened a bit before the lid sealed onto the jar?
Hypothetically, if I were to create a large vacuum chamber in which I had a robotic arm, and in this chamber I placed a jar capable of withstanding the pressure of a high vacuum, put some water into it, brought it to a boil and then used the robotic arm to afix a perfectly sealed lid to the jar before re-pressuring the chamber... would the water inside the jar continue to boil indefinitely?
Thank you for any help. I know my question is probably not phrased very scientifically, but I'm not a scientist or a physics major - just a curious layman.