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

As the water starts to boil and release steam the pressure in the container increases. With higher pressure the boiling point of water increases. Basically the container would increase in pressure and the liquid water content would become lower and lower until the container cannot hold the pressure and you get an explosion(assuming that you continue to apply heat).

Finding the pressure, vapour to liquid ratio etc. is a common exercise in introductory thermodynamics.