Open System

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Joined: Fri Sep 29, 2017 7:07 am

Open System

Postby nelms6678 » Mon Feb 12, 2018 4:40 pm

An open system can exchange both matter and energy with the surrounding - what does it mean by matter is exchanged? Does anyone have an example?

Curtis Tam 1J
Posts: 105
Joined: Thu Jul 13, 2017 3:00 am

Re: Open System

Postby Curtis Tam 1J » Mon Feb 12, 2018 4:57 pm

Open system is where you can for example actively take reactant or product out of a system. For example, i think a car gas tank can be an open system. You burn the gasoline and you can manually restore the gasoline.

Julia Campbell 2F
Posts: 31
Joined: Sat Jul 22, 2017 3:00 am

Re: Open System

Postby Julia Campbell 2F » Mon Feb 12, 2018 5:05 pm

An open system is also like a cup of coffee for example. You can exchange matter into or out of the system, like adding sugar to the coffee.

Jaewoo Jo 2L
Posts: 31
Joined: Fri Sep 29, 2017 7:06 am

Re: Open System

Postby Jaewoo Jo 2L » Sun Feb 18, 2018 8:55 pm

The human body is also a good example of a open system because heat is transferred between surroundings (heat regulated by sweating or shivering) to keep equilibrium, and we eat food (put matter into the system) to gain energy.

Mitch Mologne 1A
Posts: 74
Joined: Fri Sep 29, 2017 7:04 am

Re: Open System

Postby Mitch Mologne 1A » Sun Feb 18, 2018 9:02 pm

A good way to remember is that an open system is 'open to the surrounding' meaning the system is able to lose some of its particles, or gain some from the surroundings.

Scott Chin_1E
Posts: 55
Joined: Sat Jul 22, 2017 3:00 am

Re: Open System

Postby Scott Chin_1E » Sun Feb 18, 2018 9:04 pm

If this helps for comparison, a closed system would be like a sealed container, where heat can transfer in and out of the system but matter cannot (because the container is sealed).

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