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Did you see the demonstration of water in a closed flask boiling when cooled?
EcclesJordanTrigger
Yes. I saw it, and I was able to reproduce it in my kitchen.
I didn't have a flask, so I used a glass bottle with a screw-on cap. After the water in
the bottle was boiled, then removed from the heat and the bottle plunged into ice,
the bottle, of course, soon disintegrated, but not before the water inside it had clearly
and distinctly resumed its boiling.
Wiki User
∙ 11y ago
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How a thermos flask minimizes energy losses from convection?
As the flask is closed air tight, no convection current is possible.
A tightly closed well-insulated vacuum flask is an example of which type of system?
isolated system
How can the structure of the vacuum flask minimise energy transfer by conduction convection and radiation?
The flask has a double wall, with no air between the two walls (vacuum)- conduction. The walls are highly reflective silver- radiation. the flask has a small beck that is closed by a stopper or cap-convection.
What are the dangers of looking down through flask with boiling liquids?
Fumes can come out and burn your face and nose, and if you are not wearing safety goggles, the popping bubbles can splash in your eyes.
What is the best piece of lab equipment for holding 50 ml of boiling water?
A beaker or erlenmeyer flask or round bottom flask.See the Related Questions for more information.
What is a boiling flask used for in science?
A boiling flask, as its name implies is typically used for boiling solutions of various types. One common use is to generate the steam that will be passed through a water cooled condenser for distillation.
What is a florence flask is used for?
A florence flask is a round bottomed flask used for boiling.
What is a boiling flasks proper name?
k Vacuum flask
What is the function of round bottom flask?
A round bottom flask is called a boiling flask. I tolerates the stresses of heating better than flat bottom or Erlenmeyer flasks.
How a thermos flask minimizes energy losses from convection?
As the flask is closed air tight, no convection current is possible.
Why was it necessary to match the water levels inside and outside the cooled flask before removing it from the water bath?
So to equalize the pressure inside the flask with that of the atmosphere.
Why receiving flask supposed to be kept on ice during preparation of cyclohexene?
Cyclohexene is a volatile liquid Thus, the flask is cooled to reduce the degree of evaporation to a minimum
What is the use of thermometer in distillation?
1. The thermometer in the still head measures the boiling point of the liquid in the distillate. We can be sure of this because the boiling point of the boiling flask will vary based on how many compounds are in it. The thermometer measures the temperature of the vapor at the top of the column; this vapor will be cooled through the condenser and will condensate in the graduated cylinder at the product end of the apparatus. Therefore we are measuring the boiling point of the distillate vapor that is being condensed and collected.
What is the role of the porcelain chips in the flask?
to distribution the temperature in round bottom flask
What is bulb flask and what is it used for?
A round-bottom flask is also called a bulb flask. It's mostly used in heating solutions, as the rounded bottom allows for more uniform heating and/or boiling of liquids.
How did Louis Pasteur experiment differ from lazzaro spallanzani experiment?
Instead of sealing the flask in the experimental group after boiling, Pasteur used a flask with a curved neck, which allowed air inside and outside the flask to mix but prevented microorganisms from entering the body of the flask.
What is bottomed flask used for in science?
They're generally used as boiling flasks, particularly when the heat source is an electric mantle or steam bath.
