Boiling Point H20 @ 600 psi?

[abhipatel]

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?

 

[russ_watters]

Is it boiling or just evaporating? How big are the drops and how big is the chamber? According to a steam table, the vapor pressure of steam at that temp is 80psi and the density is 0.2 lb/ft^3. http://www.efunda.com/Materials/water/steamtable_sat.cfm

 

[abhipatel]

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.

 

[Bystander]

You might want to review Dalton's Law.

 

[alphy]

There are a few reasons why water in your chamber may be boiling or disappearing at 600 psi and 155 degrees Celsius. One possible reason is that the water is reaching its boiling point at that pressure and temperature. As pressure increases, the boiling point of water also increases. At 600 psi, the boiling point of water is around 252 degrees Celsius, so it is possible that the water is boiling and turning into steam at 155 degrees Celsius.

Another potential reason is that the CO2 you are purging into the chamber is causing a reaction with the water, resulting in the water turning into steam and disappearing. CO2 is known to have a strong affinity for water, so it is possible that it is reacting with the water molecules and causing them to evaporate.

Additionally, it is important to consider the properties of the chamber and the materials it is made of. If the chamber is not properly sealed, the pressure inside may be fluctuating and causing the water to boil or evaporate. It is also possible that the material of the chamber is not able to withstand the high pressure and temperature, causing it to deform or crack and release the water.

I would recommend further investigating the properties of your chamber and the materials you are using, as well as carefully controlling the pressure and temperature to determine the exact cause of the water boiling or disappearing. Additionally, conducting experiments with different pressures and temperatures may help to better understand the behavior of water under these conditions.