CRITICAL POINT OF WATER QUESTION
CRITICAL POINT OF WATER QUESTION
(OP)
I was looking at a water/vapor table and I noticed something interesting and am curious if anyone can give me a good explanation why.
That is when you increase the pressure of liquid water and you approach the critical point the density of the liquid decreases. It seems weird to me that when you increase the pressure of a volume of liquid the density will decrease.
Why is this?
That is when you increase the pressure of liquid water and you approach the critical point the density of the liquid decreases. It seems weird to me that when you increase the pressure of a volume of liquid the density will decrease.
Why is this?





RE: CRITICAL POINT OF WATER QUESTION
Meanwhile, liquid water still expands with temperature, regardless of the pressure it is under.
RE: CRITICAL POINT OF WATER QUESTION
RE: CRITICAL POINT OF WATER QUESTION
So lets say you have water at 30 C with a density of 996.0 kg/m3 at a pressure of 4.246 kPa and you increase the pressure to the critical point value 22,090 kPa this would mean the liquid will have a density with the critical point value of 317.0 kg/m3.
Thus the density goes down while the pressure and temperature go up????
RE: CRITICAL POINT OF WATER QUESTION
You cannot investigate the effect of pressure alone because if you set the temperature at 374.14 C and increase the pressure towards Pc you will be in the vapor regime.
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