Pressure at the boundary between two gas phases which are originally sepearted

In summary: The pressure at a point will vary depending on the velocity and position within the fluid flow. This is known as Bernoulli's principle.
  • #1
eemmann
1
0
Hi. I have got two questions...

1. How can we determine the pressure at the boundary of two gas phases (say, compressed carbon dioxide released from a can and the atmosphere) which are originally separated? If we apply the ideal gas equation on each of these two phases, different pressures will be obtained, how do we determine the the value of the pressure at the boundary??

2. The Pascal's Law states that "pressure exerted anywhere in a confined liquid is transmitted equally and undiminished in all directions throughout the liquid". I am wondering if such principle(same pressure at a point in all directions) still holds if the fluid is flowing?

Thanks.
 
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  • #2
eemmann said:
Hi. I have got two questions...

1. How can we determine the pressure at the boundary of two gas phases (say, compressed carbon dioxide released from a can and the atmosphere) which are originally separated? If we apply the ideal gas equation on each of these two phases, different pressures will be obtained, how do we determine the the value of the pressure at the boundary??

2. The Pascal's Law states that "pressure exerted anywhere in a confined liquid is transmitted equally and undiminished in all directions throughout the liquid". I am wondering if such principle(same pressure at a point in all directions) still holds if the fluid is flowing?

Thanks.
With regard to the first question, what is being asked is not clear.

With regard to the 2nd question: No. In a flowing fluid, the pressure is not uniform.
 

1. What is pressure at the boundary between two gas phases?

The pressure at the boundary between two gas phases is the force exerted by the molecules of one gas on the molecules of the other gas at the point where they meet.

2. How is pressure at the boundary between two gas phases measured?

Pressure at the boundary between two gas phases is typically measured using a manometer, which is a device that compares the pressure of the gas to a known reference pressure.

3. What factors affect the pressure at the boundary between two gas phases?

The pressure at the boundary between two gas phases is affected by the temperature, volume, and number of molecules of each gas present. The type of gas and the strength of intermolecular forces also play a role.

4. Why does the pressure at the boundary between two gas phases change over time?

The pressure at the boundary between two gas phases may change over time due to changes in temperature, volume, or the number of molecules present. These factors can cause the molecules to move more or less, resulting in a change in pressure.

5. How does pressure at the boundary between two gas phases impact the behavior of the gases?

The pressure at the boundary between two gas phases plays a crucial role in determining how the gases will behave. It can affect the rate of diffusion, how much the gases will mix together, and even whether a reaction between the gases will occur.

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