Boiling point?

[Russian]

What is H2O boiling point of 12km below MSL? I’m doing some reading on Kola Peninsula deep drilling and would like to know if water was present at that depth. (Temp at 12km depth was around 200-300C)

[Rolex]

Uh... water changes state from liquid to gasous at 100C unless it is in some form of pressure vessel. You would need to know the pressure conditions before you could determine its state.

[lasersailor184]

I think he means the water at that depth is -200 to -300 dC.  

I forget what it is or how to figure it out.  The value might be lower though, because I know that water under higher pressure than Atmospheric freezes at a lower temperature (how Ice skating works).

So I'm assuming (and I'm no chemist or physicist) that because the freezing point is lower, so is the boiling point.

[Holden McGroin]

According to my steam tables,

Pressure of Saturated Water/Steam @ 200C (473K) is 1.5 Mpa

Less pressure than 1.5 is steam, more is water

Pressure of Saturated Water/Steam @ 300C (573K) is 9 Mpa

Less pressure than 9 is steam, more is water

200-300 is a wide range... Google steam tables and you'll get your answer.

[Rolex]

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Certainly easier than trying to find old, dusty thermo books from 30 years ago...

[boxboy28]

i agree too but as said up ^(there)


I always thought water boiling - if you were in the mountians vs sea level -   water at sea level took more(heat) to make it boil. (more pressure) than it did if you were elevated (in the mountians).

[Russian]

Originally posted by lasersailor184
I think he means the water at that depth is -200 to -300 dC.  

.

No, it is 200C per one source and 300C per other source.  That's why I gave 200-300C