Melting/boiling points of water?

Question

On the Celsius scale, what are the melting and boiling points of Vienna Standard Mean Ocean Water (VSMOW)?  I'd like that answer under each of the following circumstances:

1.  Using the 1742 definitions, at 1 standard atmosphere of pressure (101.325 kPa).

2.  Using the 1744 definitions, at 1 standard atmosphere of pressure (101.325 kPa).

3.  Using the 1955 definitions, at 1 standard atmosphere of pressure (101.325 kPa).

4.  Using the 1983 definitions, at standard pressure (100 kPa).

5a.  Using the 1991 definitions, at standard pressure (100 kPa), using a thermometer calibrated to the triple point of mercury and the triple point of water.

5b.  Using the 1991 definitions, at standard pressure (100 kPa), using a thermometer calibrated to the melting point of gallium and the freezing point of indium.

6.  Using the 2020 definitions, at standard pressure (100 kPa), with a strict 2 point calibration.

7a.  Using the 2020 definitions, at standard pressure (100 kPa), using a thermometer calibrated to the triple point of mercury and the triple point of water.

7b.  Using the 2020 definitions, at standard pressure (100 kPa), using a thermometer calibrated to the melting point of gallium and the freezing point of indium.

Of course, questions 5a and 7a only apply to the melting point of VSMOW, not its boiling point.  And questions 5b and 7b are the other way around.

Anonymous · Answer

I am not reading all that.   The trick(and I believe they are trying to trick you) is  OCEAN WATER does not freeze.
So, the VSMOW means nothing to me except at "sea level" where air pressure is 14Psi   That is the same standard in New York or in Australia because the ocean is as low as you can go.

Salt water does not freeze.  They throw salt on the roads to melt ice on the roads.
The water which does freeze is fresh water.(so the salt separates out)

At sea level BP for fresh water is 100 C
At sea level FP for fresh water is  0    C

If you were at say Mount Everest top then the BP for water is Lower
also the FP for water would  also different because air pressure is lower.

I only know from hunting in high mountains that the hot coffee that is boiling is not that hot.  Never did try freezing. Guessing and you are wrong means a 50% mark...still a pass.

pisgahchemist · Answer

This question was ridiculous the last time you asked.  Nothing has changed.  It is still obtuse.

Perhaps you should start here: https://en.wikipedia.org/wiki/Vienna_Standard_Mean_Ocean_Water

Melting/boiling points of water?

Trending Questions