open system

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aaronharouni
Posts: 72
Joined: Fri Sep 28, 2018 12:15 am

open system

Postby aaronharouni » Sat Feb 02, 2019 11:27 am

How does an open beaker imply constant pressure?

Kevin ODonnell 2B
Posts: 62
Joined: Fri Sep 28, 2018 12:24 am

Re: open system

Postby Kevin ODonnell 2B » Sat Feb 02, 2019 11:46 am

This is because the open beaker is open to the entire atmosphere which is much bigger than the beaker so it makes the beaker's pressure irrelevant to any change and that is why pressure is constant. It is just like when you add a bucket of water into the Ocean it really does not make a difference on the Ocean.

RachelCheung1A
Posts: 30
Joined: Fri Sep 28, 2018 12:19 am

Re: open system

Postby RachelCheung1A » Sat Feb 02, 2019 12:14 pm

When the beaker is open, it experiences a constant pressure since the pressure it experiences is the atmospheric pressure around it which will not change since the atmosphere is too large for any change to be considered significant.

Andrew Bennecke
Posts: 62
Joined: Fri Sep 28, 2018 12:15 am

Re: open system

Postby Andrew Bennecke » Sun Feb 03, 2019 3:08 pm

In an open system, the pressure of the system=the pressure of the exterior because there is nothing preventing the exterior pressure from maintaining its pressure within the system. However, in closed and isolated systems (where no matter can be exchanged), the exterior pressure cannot interact with the system because they have no physical contact.

Niveda_B_3I
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: open system

Postby Niveda_B_3I » Sun Feb 03, 2019 4:34 pm

pressure of the system=the pressure of the exterior

juliasloan_4g
Posts: 67
Joined: Fri Sep 28, 2018 12:28 am

Re: open system

Postby juliasloan_4g » Sun Feb 03, 2019 4:40 pm

This is the same idea as adding a drop of water into the ocean. A drop of water compared to the volume of the ocean is so small that it will not affect it just like how the whole universe is tiny compared to the beaker

Katelyn Phan 2A
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: open system

Postby Katelyn Phan 2A » Sun Feb 03, 2019 4:57 pm

The constant pressure exerted onto the beaker is the atmospheric pressure which is much larger than any pressure that the system exerts on the surroundings.

Sydney Tay 2B
Posts: 64
Joined: Fri Sep 28, 2018 12:20 am

Re: open system

Postby Sydney Tay 2B » Sun Feb 03, 2019 5:00 pm

Can someone explain why irreversible processes are held at constant pressure?

Nicole Garrido 2I
Posts: 52
Joined: Fri Sep 28, 2018 12:18 am

Re: open system

Postby Nicole Garrido 2I » Sun Feb 03, 2019 8:34 pm

An open system means that matter and energy is transferred between the solution and its surroundings. The pressure in the beaker is the same as its surroundings because it is open to air and the same as normal air. This is 1atm.


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