isolated system

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bellaha4F
Posts: 104
Joined: Wed Sep 18, 2019 12:20 am

isolated system

Postby bellaha4F » Sat Feb 01, 2020 5:29 pm

can someone give examples of an isolated system?

Aarja Pavade 1H
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Joined: Sat Aug 17, 2019 12:18 am

Re: isolated system

Postby Aarja Pavade 1H » Sat Feb 01, 2020 5:48 pm

An example of an isolated system is combustion go glucose in a bomb calorimeter. The calorimeter is sealed and insulated so that nothing exchanges with the surroundings. A real life example would be coffee/tea kept in a thermos. The thermos is sealed and insulated so it retains heat, keeping the coffee/tea warm.

Daniel Chen 2L
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Joined: Fri Aug 30, 2019 12:15 am

Re: isolated system

Postby Daniel Chen 2L » Sat Feb 01, 2020 5:58 pm

Another silly example, that I had once done in high school I think, was a double-layered foam cup. It was very crude, but it got the job done.

Matthew Tsai 2H
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Joined: Wed Sep 18, 2019 12:20 am

Re: isolated system

Postby Matthew Tsai 2H » Sat Feb 01, 2020 6:05 pm

An example would be any sealed, insulated container. Technically insulation is never perfect, and a very minimal amount of heat exchange can still occur between system and surroundings, but not enough to have any significant impact on calculations.

Nicholas_Gladkov_2J
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Re: isolated system

Postby Nicholas_Gladkov_2J » Sat Feb 01, 2020 6:45 pm

bellaha4F wrote:can someone give examples of an isolated system?



Think of an isolated system as a very good thermos. You wouldn't want any contents of your thermos to come out and you wouldn't want your contents to become cold. So with an isolated system, no heat is exchanged with the surroundings, and no matter is exchange with the surroundings.

Sartaj Bal 1J
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Re: isolated system

Postby Sartaj Bal 1J » Sat Feb 01, 2020 6:47 pm

The universe is also considered an isolated system; therefore the energy of the universe is constant.

Mariana Fuentes 1L
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Re: isolated system

Postby Mariana Fuentes 1L » Sat Feb 01, 2020 7:39 pm

Think of a hydroflask

Eesha Chattopadhyay 2K
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Joined: Fri Aug 09, 2019 12:16 am

Re: isolated system

Postby Eesha Chattopadhyay 2K » Sat Feb 01, 2020 7:48 pm

An example of an isolated system is the combustion of glucose within a bomb calorimeter.

Tahlia Mullins
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Joined: Thu Jul 25, 2019 12:15 am

Re: isolated system

Postby Tahlia Mullins » Sat Feb 01, 2020 9:06 pm

In AP chemistry, we did an experiment where we made our own calorimeter using double foam cups to make sure that neither matter nor energy can be exchanged between the system and the surroundings.

rabiasumar2E
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Re: isolated system

Postby rabiasumar2E » Sat Feb 01, 2020 9:36 pm

Another example could be hot coffee in a thermos.

Lauren Stack 1C
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Joined: Sat Aug 17, 2019 12:18 am

Re: isolated system

Postby Lauren Stack 1C » Sat Feb 01, 2020 9:58 pm

If you think about the definition of an isolated system, nothing can interact with the surroundings (reactants, products, or energy). Thus, I like to think of it like a very very good thermos. If you leave hot water in it, an isolated system will keep the water heated through insulating the system and not allowing energy to flow into the surroundings.

305385703
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Re: isolated system

Postby 305385703 » Sat Feb 01, 2020 10:20 pm

a very well designed thermos that allows negligible heat transfer

Sreyes_1C
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Joined: Fri Sep 28, 2018 12:19 am

Re: isolated system

Postby Sreyes_1C » Sun Feb 02, 2020 7:21 pm

the example i think of is a hydroflask. a water bottle like that isn't perfect, but ideally you can think that the temperatures don't transfer and that the temperature of the beverage in the bottle remains the same and not phased from the temperature outside the bottle.

SimranSangha4I
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

Re: isolated system

Postby SimranSangha4I » Sun Feb 02, 2020 7:24 pm

A pretty common example you can probably relate to would be a really good thermos or even a hydroflask!


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