Open vs Closed System

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Matthew Casillas 1C
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Joined: Fri Sep 28, 2018 12:21 am

Open vs Closed System

Postby Matthew Casillas 1C » Sun Feb 03, 2019 10:35 pm

How can matter and energy be exchanged with its surroundings in certain solutions, such as in open systems, but only energy can be exchanged in other ones, closed systems?

Cole Doolittle 2K
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Joined: Fri Sep 28, 2018 12:20 am

Re: Open vs Closed System

Postby Cole Doolittle 2K » Sun Feb 03, 2019 10:39 pm

In a closed system, only energy can exchange with surroundings. An example is a sealed beaker of water. You cannot change the volume but you can heat the container because it isn't insulated and thus change the energy.

hazelyang2E
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Joined: Fri Sep 28, 2018 12:23 am

Re: Open vs Closed System

Postby hazelyang2E » Sun Feb 03, 2019 10:47 pm

Both matter and energy can be exchanged in an open system because matter is allowed to move in and out of the system, as in an open beaker. However, in a closed system, the amount of matter must stay constant so only the energy is exchanged.

Aurbal Popal
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Joined: Fri Sep 28, 2018 12:27 am

Re: Open vs Closed System

Postby Aurbal Popal » Sun Feb 03, 2019 10:49 pm

Think about it like this:
If you had a reaction occurring in a beaker, and there was no lid, the reaction would be exposed to the air. Therefore, it may react with molecules in the air, such as oxygen and hydrogen, or gas produced by the reaction may escape. Energy would also go out to the environment. For example, if you boil water in an open beaker, all the steam would escape into its surroundings; physical matter is escaping. The energy is being exchanged as it is being heated. This is an open system.

If you had a reaction occurring in a beaker, and there was a lid, the reaction will not be exposed to the air. Therefore, all the matter in the reaction will be maintained; however, energy may come and go. If you boil water in a beaker with a lid, the steam that was formed will still be in the beaker, so matter will be lost; however there was an exchange of energy as you were able to heat the beaker.

In an isolated system, neither energy or matter is exchanged. So if you wanted to boil cool water in an isolated system (let's say you had a really, really effective thermos), the water inside would not change states (or temperature) as heat cannot enter the system, and the water inside could not interact with other molecules outside of the thermos.

Hope this makes sense.

George Ghaly 2L
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Re: Open vs Closed System

Postby George Ghaly 2L » Mon Feb 04, 2019 4:33 pm

The simplest way to put it is that in an open system heat and material can be exchanged, in a closed system only heat can be exchanged with the surroundings, but in an isolated system nothing can be exchanged with the surroundings.

haleyervin7
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Joined: Fri Sep 28, 2018 12:15 am

Re: Open vs Closed System

Postby haleyervin7 » Thu Feb 07, 2019 12:26 am

In an open system both material and energy can be exchanged, but in a closed system only energy can. To put this in everyday terms, compare a glass of water with a sealed bottle of water. In the glass, water and heat can be added, but in the sealed bottle, only heat can be added.

Calvin Patel 2H
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Joined: Fri Sep 28, 2018 12:22 am

Re: Open vs Closed System

Postby Calvin Patel 2H » Thu Feb 07, 2019 11:44 am

In an open system, there is a possibility for matter to exchange with the solution since it is open and matter can be exchanged with the surroundings. However, in a closed system, only energy can be exchanged since the system is closed so no matter can enter or exit.

MackenziePerillo-1L
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Joined: Fri Sep 28, 2018 12:19 am

Re: Open vs Closed System

Postby MackenziePerillo-1L » Thu Feb 07, 2019 9:09 pm

Is the only example of an isolated system a calorimeter?

Nicole Lee 4E
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Re: Open vs Closed System

Postby Nicole Lee 4E » Thu Feb 07, 2019 10:44 pm

Another example of an isolated system would be a thermos.

BenJohnson1H
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Joined: Fri Sep 28, 2018 12:17 am

Re: Open vs Closed System

Postby BenJohnson1H » Sat Feb 09, 2019 8:02 pm

Think this: cup=open system, water bottle=closed system, hydroflask=isolated system

Raj_Bains_2C
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Re: Open vs Closed System

Postby Raj_Bains_2C » Sat Feb 09, 2019 9:11 pm

In an open system, the container is left open, so matter (like gasses) and energy (like heat) can escape the system, which is the container. In a closed system, the container has been closed (a cap is placed on a jar, for example), so matter (like gasses) can't escape, but energy (like heat) can still escape through the walls of the container.

yuetao4k
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Re: Open vs Closed System

Postby yuetao4k » Sun Feb 10, 2019 9:47 pm

Closed systems have a barrier that prevents matter from escaping. Open systems have no form of barrier that prevents anything from being transferred to the surrounding.

taryn_baldus2E
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Joined: Fri Sep 28, 2018 12:24 am

Re: Open vs Closed System

Postby taryn_baldus2E » Sun Feb 10, 2019 9:50 pm

Nicole Lee, an example of an isolated system that was given in the textbook was a high-quality thermos bottle since it is insulated and therefore does not exchange matter or energy.

Elizabeth Kim 4E
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Re: Open vs Closed System

Postby Elizabeth Kim 4E » Mon Feb 11, 2019 12:08 pm

In a closed system, matter must stay fixed, but an open system is more flexible


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