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Cup of Tea

Posted: Sun Feb 03, 2019 11:53 pm
by Lina Petrossian 1D
Could someone explain why a cup of tea is considered an open system?

Re: Cup of Tea

Posted: Sun Feb 03, 2019 11:57 pm
by Sarah Zhao 4C
It's open because you can change the amount of tea. If you are able to pour more tea into it, it's because it is open!

Re: Cup of Tea

Posted: Sun Feb 03, 2019 11:59 pm
by josephperez_2C
A system which can interchange mass and energy is considered an open system. A cup of tea is susceptible to the environment.

Re: Cup of Tea

Posted: Mon Feb 04, 2019 12:08 am
by eden tefera 2B
since in a cup of tea will cool down over time, it will exchange energy with surroundings. since a cup is typically not covered on the top, tea could also leave the system . since both matter and energy can be exhanged, then a cup of tea is an open system

Re: Cup of Tea

Posted: Mon Feb 04, 2019 12:23 am
by Brandon_Tran_2E
Because it is an open system the system also is at a constant pressure because the system's pressure is the same as the outside pressure.

Re: Cup of Tea

Posted: Mon Feb 04, 2019 1:44 am
by Phil Timoteo 1K
Because it is susceptible to change.

Re: Cup of Tea

Posted: Mon Feb 04, 2019 10:02 am
by Mikka Hoffman 1C
It's open because it can exchange both matter and energy with its surroundings. For example, you can add or take away tea and it can also be cooled or heated.

Re: Cup of Tea

Posted: Mon Feb 04, 2019 4:34 pm
by Sapna Ramappa 1J
A cup of tea would be an open system because matter and energy can be transferred between the system and the surroundings.

Re: Cup of Tea

Posted: Mon Feb 04, 2019 5:36 pm
by juliasloan_4g
you can both change the matter within it (the tea) and transfer energy by holding it and making it warmer or cooler

Re: Cup of Tea

Posted: Mon Feb 04, 2019 6:01 pm
by Charles Hood Disc 1C
An open cup of tea can have its matter and energy changed. It fully interacts with the surroundings.

Re: Cup of Tea

Posted: Tue Feb 05, 2019 6:15 pm
by Jennifer Torres 2L
A cup of tea is open to the surroundings. So matter can enter and exit (steam, sugar, etc.) and energy can leave in the form of heat.

Re: Cup of Tea

Posted: Tue Feb 05, 2019 8:19 pm
by Nina Do 4L
A cup of tea can interact with its surroundings, ie release heat from the tea into the universe, making the universe infitesmilly warmer. Closed systems like a hydro flask or thermos cannot do that, it is isolated/insulated.

Re: Cup of Tea

Posted: Tue Feb 05, 2019 9:12 pm
by Selina Bellin 2B
you can change it's energy AND matter. you can add or remove the tea, and you can heat it up/cool it down :)

Re: Cup of Tea

Posted: Wed Feb 06, 2019 9:36 am
by Ricardo Martin 1J
It is open because matter and energy can be transferred in and out of it.

Re: Cup of Tea

Posted: Wed Feb 06, 2019 10:26 am
by Lynsea_Southwick_2K
As defined in the textbook an open system can exchange matter and energy

Re: Cup of Tea

Posted: Thu Feb 07, 2019 3:52 pm
by Laurence Tacderas 1K
The tea can receive and transfer matter to its surroundings, as well as energy in the form of heat

Re: Cup of Tea

Posted: Thu Feb 07, 2019 4:26 pm
by Katie_Duong_1D
A cup of tea is an open system because energy and matter can exchange with the surroundings. You can add more/less tea (matter), and tea can become hotter/colder (energy).

That's the tea, sis


Re: Cup of Tea

Posted: Tue Feb 19, 2019 1:36 am
by Krista Mercado 1B
It can exchange both matter and energy with its surroundings.