Pressure Calculations through Volume Differences

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Discussion Overview

The discussion revolves around the concept of pressurizing water through the release of hydration waters in hydrates, specifically focusing on the implications of creating a volume difference within a fixed-volume container. Participants explore the feasibility of achieving pressure from this volume difference and the mathematical calculations involved.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant proposes that a volume difference inside a fixed-volume container could theoretically create pressure, citing a specific volume calculation from hydrates.
  • Another participant challenges the feasibility of this idea, arguing that the statement about volume difference is contradictory and questioning the logic behind increasing the density of contained water.
  • A different viewpoint suggests that while water has sub-atomic space that can be compressed, the pressure required would exceed the structural limits of a fixed container.
  • Another participant counters that water is compressible to some extent, as evidenced by the propagation of sound waves, and questions why water is treated differently from other materials like steel.
  • One participant expresses skepticism about the method of releasing hydration waters, suggesting that high-pressure water applications in nuclear reactors might be a more relevant context for discussion.

Areas of Agreement / Disagreement

Participants exhibit disagreement regarding the feasibility of pressurizing water through the proposed method, with some asserting that it is not possible while others argue for the compressibility of water under certain conditions. The discussion remains unresolved.

Contextual Notes

There are limitations regarding the assumptions made about compressibility, the definitions of volume and pressure in this context, and the structural integrity of containers under high pressure. These aspects remain unclear and unresolved.

EthanSchrag
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Recently I've been researching the pressurization of water through the releasing of the waters of hydration in hydrates. The goal is to create a volume difference inside a container of fixed volume, basically the volume of the contents should be greater than the volume of the container in order to create pressure. Mathematically this works out and theoretically you can get a volume of 113.21ml from 100ml of a hydrate. But i don't know what to do with these numbers. I want an overall pressure and I'm assuming you can get one from them but i don't know exactly how to calculate it (Is this kind of pressurization of water even possible?). Help would be appreciated.
 
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Welcome to PF;
Is this kind of pressurization of water even possible?
You realize that the statement " volume difference inside a container of fixed volume" is a contradiction and " the volume of the contents should be greater than the volume of the container in order to create pressure" does not make sense.
... you seem to want to force more water into an existing volume than the volume can contain, ie. increasing the density of the contained water?
So the short answer is "no". Though the water may contain something else that is more compressible.
However, it could be that you are just not communicating clearly - can you provide a reference for the process you want to study?
 
Every form of matter has sub-atomic space that can be compressed to a greater density. Water is no exception but the pressure required would likely be greater than a fixed size container can structurally withstand. For all practical purposes water cannot be compressed.
 
Well, sending ultrasound through water is a practical enough purpose.
If water weren't compressible there would be no longitudinal sound waves in it.

The compressibility of water is much higher than that of steel or aluminum. However I never seen someone saying that steel cannot be compressed (even if only "for all practical purposes").
Why is water so special? :)
 
Not sure that "releasing waters of hydration" would be a useful method either... high pressure water is used in water cooled nuclear reactors where, one could argue, the water in the pipes would otherwise occupy a larger volume (as steam). I think we need details.

Also see ie.
http://water.usgs.gov/edu/compressibility.html
 

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