Hi, It is supposed a metal container hermetically closed and completely filled with water; the container is supposed to have unlimited strength, so doesn’t deform under internal or external pressure. What will be happen if we heat the water over its critical temperature (374 C degrees – 705.2 F degrees)? Will it become steam? If yes, how? Because the container is fully filled with water and this is denser than steam (that is a gas). If doesn’t become steam (gas), will continue the water increasing its temperature over the critical temperature as we increase the temperature we apply? Thanks a lot. PS – I apologize for my English, I am learning it.