To what degree is water compressible? Does the density of water change with depth? By how much?

The low compressibility of water means that even in the deep oceans at 4000 m depth, where pressures are 4×107 Pa, there is only a 1.8% decrease in volume.

This Site Might Help You.

RE:

To what degree is water compressible? Does the density of water change with depth? By how much?

I was taught that water is incompressible and that its density does not change with depth. Is this true? Is the density of water at the bottom of the Marianas trench (10920 meters deep) significantly different than that at the surface? I am asking specifically about water in the liquid state,...

I see this discussion is from years ago, but just in case you still get updates on it... (Found this while researching for a tangentially related project of my own.)

Water is typically described as "incompressible" because for all practical purposes, in the world inhabited be normal humans, it's compressibility is absolutely insignifican't and in the same range as most solids. You probably think of steel as incompressible, but at 16,000 psi, you could probably measure the difference, you would just have to spend $100,000 on a titanium pressure vessel to find that out, so most people woulf never notice or care.

I'm not really sure about the pressure/temperature/density relationships down in that range, but I don't think it's as simple as MAXVO2 makes it sound. In the deepest parts of the ocean (and maye where you're talking about), water can actually be BELOW 0c (the salt keeps it from freezing).

But, yeah, as long as your vessel is at least slightly flexible, assuming it doesn't already expand FASTER than the water inside, you probably wouldn't have a problem. The real woorry is that most sea-level, gasses are also liquid at that pressure and COULD be in that water, and expand tremendously towards the srface. You could still just put a 1-way valve near the top of the vessel to let any gasses escape, but A) i doubt there will be any at that depth and B) if there are, you might WANT those in your sample which puts you back to square 1...

Compressibility Of Water

Yes, it's true - water density hardly changes with pressure. For most practical calculations, you can assume that water density is only a function of temperature and dissolved substances (if any). Water density is highest at 4°C. If the ocean floor has no heat sources, such as hot vents or volcanoes, the densest water will collect at the bottom. In fact, much of the deep ocean water is at 4°C.

For the best answers, search on this site https://shorturl.im/hmOKP

It gets a little denser. You need to use the bulk modulus of water, which tells you the relationship between ΔV/V and pressure. Water is fairly incompressible, so density doesn't change much with depth, but it does change.

Wats er is compressible. The weight of the ocean excerts massive pressure the deeper you go. Enough to crush steel at 10K feet.

i thought density was a property of a substance so it cant change

water is an incompressible fluid. that's why it's better to fall on dirt than water if your parachute fails.

You are my density, bro.