Open vs Closed Systems

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AlyssaBei_1F
Posts: 99
Joined: Fri Sep 28, 2018 12:17 am

Open vs Closed Systems

Postby AlyssaBei_1F » Mon Feb 04, 2019 9:51 am

I get confused on identifying open vs closed systems. Can someone give me examples of each and how they go about differentiation one vs the other?

Tam To 1B
Posts: 72
Joined: Fri Sep 28, 2018 12:25 am

Re: Open vs Closed Systems

Postby Tam To 1B » Mon Feb 04, 2019 10:15 am

An open system is one in which matter and energy can exchange with the surroundings.
A closed system is one in which only energy can exchange with the surroundings.
An isolated system is one in which nothing can exchange with the surroundings.

For example, an open system can just be a cup of hot water without a lid. The water can evaporate and cool since it is an open system.
A closed system would be a cup of hot water with a lid on top. Water won't be able to evaporate the same as if it would have without a lid, but it can still cool down.
Meanwhile, an isolated system would be if the hot water was in a thermos. This way, it can't evaporate nor cool down.

Adrienne_4F
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Re: Open vs Closed Systems

Postby Adrienne_4F » Mon Feb 04, 2019 8:08 pm

Hi, it might be helpful to look at question 8.1. They ask you to identify which systems are open, closed, or isolated.

Kessandra Ng 1K
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

Re: Open vs Closed Systems

Postby Kessandra Ng 1K » Tue Feb 05, 2019 9:54 am

An important distinction is between closed and isolated systems also, because the bomb calorimeter example seems to come up a lot in class so maybe this is an idea that we need to understand really well. The bomb calorimeter would be closed instead of isolated, as it allows heat to be exchanged and not matter.

Jennifer Torres 2L
Posts: 62
Joined: Tue Nov 14, 2017 3:01 am

Re: Open vs Closed Systems

Postby Jennifer Torres 2L » Tue Feb 05, 2019 5:59 pm

Open System: BOTH matter and energy interact with surrounding.

Closed System: ONLY energy interacts with surroundings.

Isolated system: NOTHING interacts with surroundings


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