## Open Beaker [ENDORSED]

isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$

Janice Xiao 1I
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

### Open Beaker

If a reaction occurs in an open beaker, does that mean it's at constant pressure?

Sungyoon_Baek_1A
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### Re: Open Beaker

yes. since the open beaker is exposed to the open atmosphere and the atmosphere is very very large in comparison to the small beaker, the pressure is constant.

Matthew 1C
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Joined: Fri Sep 29, 2017 7:06 am

### Re: Open Beaker

Yes because it can equilibriate with the pressure of the surroundings

Vivian Nguyen
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### Re: Open Beaker

Yes^, I believe so because the surroundings in an open beaker are so large that the pressure is constant /unchanging. I might be wrong, but I think this is when Dr.Lavelle used the examples about whether the temperature of the surroundings would be affected by an individual lighting a match. The pressure of an open system would not change either.

Andrea ORiordan 1L
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### Re: Open Beaker  [ENDORSED]

All of the above are correct-- one more example I found helpful with regard to the difference between system and surroundings was the ocean analogy. If you add a bucketful of water to the ocean, it doesn't really change the volume or pressure.

Amelia Georgius 1K
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### Re: Open Beaker

Because the system is open it can therefore remain at a constant pressure with its surroundings because it can exchange both energy and matter to come to an equilibrium pressure state.