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Topic: Boiling in a sealed container?  (Read 2902 times)

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Offline klee256

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Boiling in a sealed container?
« on: August 14, 2016, 02:56:57 AM »
Can you boil a liquid in a sealed container? I looked it up on google, and I'm getting mixed answers...
Thanks! ;D

Offline AWK

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Re: Boiling in a sealed container?
« Reply #1 on: August 14, 2016, 03:22:46 AM »
Be more precise.
Warming sample of peptide or protein with HCl in a sealed glass ampoule is a popular method of preparation samples of these compounds for further analysis.
There are also small chemical reactors working at higher pressure.
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Offline Arkcon

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Re: Boiling in a sealed container?
« Reply #2 on: August 14, 2016, 06:35:19 AM »
If you know some facts, you could potentially calculate how much pressure a sealed container ends up under the conditions you know,and how much pressure a container can handle.  There are likely tables that you can search for, and you can always ask the manufacturer.

[EDIT]

Also, please trouble yourself to read our Forum Rules{click}.  You agreed to them when you signed up, and we expect you to follow them.  This is a learning forum, we want to help you help yourself.  We're not here to fill all the gaps in Yahoo answers for a random "Kewl idea" you may have.
« Last Edit: August 14, 2016, 10:10:42 AM by Arkcon »
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Offline kamiyu

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Re: Boiling in a sealed container?
« Reply #3 on: August 14, 2016, 07:06:21 AM »
Sealed Container is a closed system and boiling in it is extremely dangerous.

But there are some known examples such as microwave reactors and autoclave reactors.

I strongly advise you seek help from the experienced seniors about the safety. Have visor, not safety glass.

Note, once there is an accident (i.e. explosion) the force of the blown glass is in terms of cutting off your fingers and penetrate through safety glasses.

Best luck!

Offline Arkcon

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Re: Boiling in a sealed container?
« Reply #4 on: August 14, 2016, 10:13:05 AM »
Sealed Container is a closed system and boiling in it is extremely dangerous.

But there are some known examples such as microwave reactors and autoclave reactors

For that matter, my mother routinely cans your summer produce in canning jars.  They aren't perfect seals during the boiling process, but if you just ask, "Can I boil a container in another container", you'll get that as an example.  So if you don't want bad advice, you'll have to be more specific.
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline AWK

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Re: Boiling in a sealed container?
« Reply #5 on: August 14, 2016, 10:43:38 AM »
Temperature in jars do not exceed 100 C. Glass jars with twist off closures are not closed totally. Pressure inside jars is only a bit higher then atmospheric one during canning. And jars after canning and cooling shows reduced pressure. Breaking of jar during canning sometimes happens (bit very rarely, and this is not typical explossion).
But your chemical experiments at home may be more dangerous.
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Offline klee256

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Re: Boiling in a sealed container?
« Reply #6 on: August 15, 2016, 03:00:04 PM »
Sorry, I should've read the forum rules more carefully and been more specific.
It's a question that showed up as a 'thinking point' in my textbook, and I couldn't figure it out.

I guessed that it would be, in practice, dangerous, but what would happen to the liquid (for example, water) as it rises in temperature in a sealed container (assuming that the container doesn't melt, explode, etc.)? Will it eventually boil and completely turn into vapor?

I got confused because I thought that you needed a closed vessel for the vapor to exert vapor pressure, and the textbook said that boiling happens in an open container.
Thank you!

Offline AWK

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Re: Boiling in a sealed container?
« Reply #7 on: August 15, 2016, 03:12:50 PM »
Up to 217.7 Atm and temp 374.4 C (critical point) liquid water is in equlibrium with its vapors.

Look in the table for boiling points of water:
http://www.engineeringtoolbox.com/boiling-point-water-d_926.html
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Offline Borek

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Re: Boiling in a sealed container?
« Reply #8 on: August 15, 2016, 03:52:18 PM »
I got confused because I thought that you needed a closed vessel for the vapor to exert vapor pressure

All you need for the vapor pressure to exist is the vapor itself.

Atmospheric gases are vapors of their respective liquids. Atmosphere is not in a closed container. Yet it exerts more or less 10 N per each 1 square cm of your body surface.

Quote
and the textbook said that boiling happens in an open container.

You have never boiled water in an open cooking pot?
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