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

The pressure would raise the boiling point of the water. As the temperature continues to rise you’d have more water boil but this would in turn raise the pressure. At each temperature you’d find an equilibrium between steam and water. This will continue until you’re left with an container full of steam, a container full of plasma, or a container that exploded.