Constant Pressure in open systems(?)

[Gladys Nava 1K]

just to clarify, every open system has constant pressure, right?

[Anil Chaganti 3L]

Yes, I believe that an open system has constant pressure since it is exposed to atmospheric pressure which is rather constant throughout. Any additional pressure is negligent compared to atmospheric pressure, so we can assume that an open system has constant pressure.

[Jarrett Sung 3B]

Open systems have a constant pressure. This is caused by the environment, which unless the system is placed in a very specific place will be relatively the same.

[Kyle Walsh 2J]

Hi! Yep, I'm pretty sure that all open systems are assumed to have constant pressure because any change in pressure is so much smaller when compared to the surroundings of the system. Hope this helps!

[705586182]

How about for constant volume in open systems?

[Nadia Svejda 3L 14B]

Yes, pressure is constant in open systems. Since the pressure is essentially coming from the atmosphere itself, it stays constant (at least for our purposes). It's like Professor Lavelle's example in one of the lectures: if someone dumped a bottle of water into the ocean, it would not really change the volume of the ocean in a measurable way. It is the same for standard pressure in open systems: almost all changes to the atmosphere do not really do anything to its pressure (again, for our purposes) so it remains constant.

[Catherine Grigorian 3L]

Yes, an open system does have constant pressure. The reason for this is because of the environment. If you were to change the system, like adding a molecule, it would try to keep its pressure constant by changing the volume (either increasing it or decreasing it).