Closed and Isolated

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Netpheel Wang 4L
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Closed and Isolated

Postby Netpheel Wang 4L » Mon Feb 04, 2019 12:13 pm

How can you tell if a system is closed or isolated?

Courtney McHargue 1I
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Joined: Fri Sep 28, 2018 12:17 am

Re: Closed and Isolated

Postby Courtney McHargue 1I » Mon Feb 04, 2019 1:15 pm

If it's closed then matter can't be added or taken away from the system, such as a closed box, but heat can still transfer into and out of it. If the system is isolated, then it's like a highly insulated box where matter and heat both can't be transferred into or out of the system.

Casandra
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Re: Closed and Isolated

Postby Casandra » Mon Feb 04, 2019 1:34 pm

In a closed system matter can't exchange with the surroundings but energy can in forms of heat or work, a closed system can also have a fixed volume.
In an isolated system nothing exchanges with the surroundings .

Samantha Chang 2K
Posts: 69
Joined: Fri Sep 28, 2018 12:17 am

Re: Closed and Isolated

Postby Samantha Chang 2K » Mon Feb 04, 2019 3:07 pm

In a closed system, heat can still travel in and out of it, but in an isolated system nothing can affect the internal energy(that is why U=0 for a closed system).

havishgattu
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Joined: Fri Sep 28, 2018 12:22 am

Re: Closed and Isolated

Postby havishgattu » Mon Feb 04, 2019 3:11 pm

Why would a plant be seen as an open system? Why is it not multiple closed systems? wouldn't a cell be a closed system?

KatrinaPho_2I
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Joined: Fri Sep 28, 2018 12:28 am

Re: Closed and Isolated

Postby KatrinaPho_2I » Mon Feb 04, 2019 3:19 pm

The plant as a whole interacts with the environment in terms of mass (O2, CO2, water) and energy (sunlight and thermal).

Patrick Cai 1L
Posts: 93
Joined: Fri Sep 28, 2018 12:25 am

Re: Closed and Isolated

Postby Patrick Cai 1L » Mon Feb 04, 2019 3:59 pm

Cells in this case would be seen exchanging molecules of CO2 and O2 while also having freely exchanging energy, making it an open system.

Yiting_Gong_4L
Posts: 69
Joined: Fri Sep 28, 2018 12:25 am

Re: Closed and Isolated

Postby Yiting_Gong_4L » Mon Feb 04, 2019 4:02 pm

A closed system is where substance can’t be added or removed, but heat can still be transferred in and out. An isolated system is where heat can not be transferred.

Sapna Ramappa 1J
Posts: 63
Joined: Fri Sep 28, 2018 12:24 am

Re: Closed and Isolated

Postby Sapna Ramappa 1J » Mon Feb 04, 2019 4:33 pm

In a closed system, heat can still be transferred even though the system can't add or remove anything. However, in an isolated system, there is no heat exchange.

Cody Do 2F
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Closed and Isolated

Postby Cody Do 2F » Mon Feb 04, 2019 4:45 pm

In reference to the plant question, any biological organism is considered an open system. This is because all organisms that we know of today interact with their environment in various ways. Plants take in matter through the air and ground, which is used to grow, and also utilize solar energy from their surroundings. Animals are similar in that they take in matter through their mouth/nose and can freely exchange energy with their surroundings (Think of the sunlight warming you up, or your hand getting cold when you touch an ice cube). Cells act this way as well since they take in matter (various chemicals, hormones, etc) and also respond to energy changes (nerve cells).

Ricardo Martin 1J
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Joined: Fri Sep 28, 2018 12:15 am

Re: Closed and Isolated

Postby Ricardo Martin 1J » Wed Feb 06, 2019 9:34 am

A closed system does not allow for matter transfer, but allows for energy transfer. An isolated system does not allow for both matter and energy transfer.


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