Between the temperature points [tex]t_{4}[/tex] and [tex]t_{5}[/tex], the molecules are leaving the liquid phase.
Explanation:
Reading the conversion of states of matter through a graphical representation; we can easily see that the matter is converting from the liquid phase to gaseous phase respective to the temperatures [tex]t_{4}[/tex] to [tex]t_{5}[/tex].
As the solid is heated at a constant rate at 1 atm pressure, it changes its state from solid to liquid and then liquid to gas consistently.
As the matter crosses the temperature [tex]t_{4}[/tex], it leaves it's liquid phase and starts transforming into its gaseous version. It's quite obvious that the temperature will go on increasing until the matter reaches its gaseous state.
