Pressure in an open beaker
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Pressure in an open beaker
In an open beaker system, how do we know that the system is at constant pressure?
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Re: Pressure in an open beaker
Since the beaker is an open system, you can assume that the pressure is whatever the atmospheric pressure is. Unless you are somehow constantly changing in elevations or something else, I think you can otherwise assume that the pressure is constant?
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Re: Pressure in an open beaker
For an open beaker system, the beaker is open to the atmosphere, therefore the system and surroundings have the same pressure, in this case, it is the atmospheric pressure.
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Re: Pressure in an open beaker
All of the above answers are correct. Something that I found helpful to remember regarding the differences between a system and its surroundings is the ocean analogy. Spilling half a liter of water into the ocean doesn't affect its pressure.
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Re: Pressure in an open beaker
Maya Gollamudi 1G wrote:In an open beaker system, how do we know that the system is at constant pressure?
The pressure in an open beaker is constant.
The surrounding system is so large that your reaction will have virtually no influence on the surrounding system's pressure; as a result, your pressure is constant.
Re: Pressure in an open beaker
Adding moles of gas to the atmosphere does not change its overall pressure in a way that's measurable. Therefore, an open system has a constant external pressure.
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Re: Pressure in an open beaker
An open beaker system allows the exchange of pressure between its surroundings and the system. Since the atmosphere is relatively large, the pressure of the beaker will not have an effect on it, almost like a drop-in-the-bucket type deal. We can then infer a constant pressure because of this.
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Re: Pressure in an open beaker
In an open beaker, the system is at constant pressure because there is no volume to contain any increase or decrease in pressure, and the pressure of the system will be the same as the atmosphere.
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Re: Pressure in an open beaker
Is the constant pressure being referred to by everyone just 1 atm? Or will the actual pressure be given with the question?
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Re: Pressure in an open beaker
Actual pressure should be given. If it is not given it will cancel out and not be necessary for calculations
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Re: Pressure in an open beaker
Pressure in an open beaker is always constant since there isn't a volume to drop or increase pressure
Re: Pressure in an open beaker
The pressure in an open beaker would be the pressure of the surroundings. The surroundings is typically at a constant pressure.
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