Water at room temperature is placed in a flask connected by rubber tubing to a vacuum pump, and the pump is turned on. After several minutes, the volume of the water has decreased, and what remains has turned to ice. Explain

Video transcript

Hello. In this problem, we're told that removal water from samples using a vacuum is a routine procedure in many laboratories and industries. When this process is applied, the amount of water and the sample is reduced after several minutes. However, a small amount that remains in the end often turns to ice. Were asked to explain why that is so when water is removed, buy vacuum, boiling point of water. Yes. Lord. What that means then, is that more water vapor is present at a lower temperature than under normal conditions. So as water vapor is being removed, more water paper is produced an equilibrium process. So the system tries to maintain the same amount of water vapor evaporation. Is it cooling process? This is why when we sweat that sweat then evaporates off of our bodies and helps to cool down our bodies. And so with the continuous production of water favor, the temperature continues to decrease eventually. Then the boundary between liquid and a solid is crossed and the remaining water freezes. I hope you found this explanation to be helpful. Thanks for watching.