When all of the solid has melted, heating the liquid raises its temperature until its boiling point is reached (point B).
(all of the solid; has melted; ) (heating the liquid; raises; its temperature; T:until its boiling point is reached (point B; T:When all of the solid has melted) (its boiling point; is reached; )
all of the solid heating the liquid its boiling point
has melted raises is reached
its temperature T:until its boiling point is reached (point B T:When all of the solid has melted