May 31, 2023, 06:25:24 AM
Forum Rules: Read This Before Posting

Topic: spilling out water while boiling  (Read 226 times)

0 Members and 1 Guest are viewing this topic.

Offline mana

  • Full Member
  • ****
  • Posts: 182
  • Mole Snacks: +3/-3
spilling out water while boiling
« on: April 29, 2023, 03:10:11 AM »
Hi all
some students were trying to measure boiling point of water by heating a half full beaker containing distilled water on a heater, near the boiling point of water (above 90 oC) when their thermometer contacted with the bottom of the beaker, the boiled water spilled out suddenly, all the time that they did that the water spilled out. can anyone explain why this happen?

Offline Hunter2

  • Sr. Member
  • *****
  • Posts: 1948
  • Mole Snacks: +148/-45
  • Gender: Male
  • Vena Lausa moris pax drux bis totis
Re: spilling out water while boiling
« Reply #1 on: April 29, 2023, 06:25:55 AM »
At the bottom the temperature is more hot and the water is overheated. To ditch with something to the bottom it disturbs and the water directly vaporise and the steam pull out the liquid water.
Compare put some small boiling stones in the Beaker and it will not happen.

Offline Vidya

  • Full Member
  • ****
  • Posts: 818
  • Mole Snacks: +45/-62
  • Gender: Female
  • Online Chemistry and Organic Chemistry tutor
    • Online Chemistry Tutor
Hunter is right. When we add pumice stone during boiling of liquids ,we create a passage for steam collected at the bottom(due to difference in temp) to move out and this helps in preventing liquid to *Ignore me, I am impatient* out. 

Sponsored Links