Cup of Tea

[Lina Petrossian 1D]

Could someone explain why a cup of tea is considered an open system?

[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!

[josephperez_2C]

A system which can interchange mass and energy is considered an open system. A cup of tea is susceptible to the environment.

[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

[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.

[Phil Timoteo 1K]

Because it is susceptible to change.

[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.

[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.

[juliasloan_4g]

you can both change the matter within it (the tea) and transfer energy by holding it and making it warmer or cooler

[Charles Hood Disc 1C]

An open cup of tea can have its matter and energy changed. It fully interacts with the surroundings.

[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.

[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.

[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 :)

[Ricardo Martin 1J]

It is open because matter and energy can be transferred in and out of it.

[Lynsea_Southwick_2K]

As defined in the textbook an open system can exchange matter and energy

[Laurence Tacderas 1K]

The tea can receive and transfer matter to its surroundings, as well as energy in the form of heat

[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

[Krista Mercado 1B]

It can exchange both matter and energy with its surroundings.