Why Does Water Boil at 155°C Under 600 psi Pressure?

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Discussion Overview

The discussion centers on the boiling point of water under high pressure, specifically at 600 psi, and the unexpected behavior of water when heated to 155°C in a chamber. Participants explore the reasons behind the observed phenomena of water boiling or evaporating under these conditions.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant references a psychometric chart indicating that the boiling point of water at 600 psi is 252°C, raising questions about the discrepancy with their observations.
  • Another participant questions whether the water is boiling or simply evaporating, suggesting that the size of the water drops and the chamber may influence the behavior of the water.
  • A third participant notes that the chamber is large and the water amount is minimal (100 mg), implying that evaporation might be more likely than boiling.
  • One participant suggests reviewing Dalton's Law, potentially indicating that gas pressures and partial pressures could be relevant to the discussion.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether the water is boiling or evaporating, and there are competing views regarding the implications of chamber size and water quantity on the observed behavior.

Contextual Notes

There are limitations regarding the assumptions made about the behavior of water under pressure, the definitions of boiling versus evaporation, and the specific conditions within the chamber that may not be fully explored.

Who May Find This Useful

Individuals interested in thermodynamics, phase changes of water, and the effects of pressure on boiling points may find this discussion relevant.

abhipatel
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Boiling Point H20 @ 600 psi?

According to the psychometric chart boiling point of water @ 600 psi is 252 C.

I have a chamber with water inside (in forms of weight measured drops). I am purging CO2 at 600 psi in the chamber. After am heating the chamber to 155 deg C expecting the water to stay.

It boils or just goes away - I have no idea why it is happening?

Could anyone please explain what are the potential reasons that could be happening?
 
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I think just evaporating because I can't see it boiling...The chamber size is quite big...and water measured would be like 100 mg max.
 


You might want to review Dalton's Law.
 

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