Eli5 what would happen if you had water in a completely sealed container and brought it past boiling temp

Question

Would it just turn into a pressurized container full of steam? Would the water stay water but just like, really hot?

In: 98

Answer 1

Depends on container size and how much water is in it. If you’ve ever seen one of those water phase diagrams you can get a good notion of how its state varies, not just with temperature but also with pressure. In theory it’s possible to have liquid water at any temperature, so long as the pressure inside the container is high enough.