[ELI5] Can one physically compress water, like with a cyclinder of water with a hydraulic press on the top, completely water tight, pressing down on it, and what would happen to the water?

Question

[ELI5] Can one physically compress water, like with a cyclinder of water with a hydraulic press on the top, completely water tight, pressing down on it, and what would happen to the water?

In: 1967

Answer 1

Yes. Water is not completely incompressible. Increased pressures will vary its density slightly, and at extreme pressures (on the order of >=1 GPa), water will solidify, even at room temperature.

Ice / water / water vapour phase transitions are described by a phase diagram. Water ice can take several different forms depending on the combination of temperature and pressure.