Is freezing point always depressed by a solute?

[Evis]

Homework Statement

Is the freezing point always depressed by a solute even if solute-solvent interactions are stronger than solute-solute and solvent-solvent interaction? What about amorphous solids?

2. Relevant knowledge
According to my chemistry teacher's powerpoints, the freezing point is always depressed by the presence of a solute because the solute particles disrupt the lattice structure of the solid.

The Attempt at a Solution

Thus, the solution remains liquid at lower than normal temperatures due to the added difficulty of forming the solid structure. The stronger solute-solvent interactions add to this disorder.

In amorphous solids where there is little/no organized set structure to speak of, I don't know how solute particles would interfere unless the solute forms its own competing structure as a solid. Otherwise, I'm in the dark.

 

[Borek]

Amorphous solids don't have a freezing point.

 

[Evis]

Do amorphous solids not have changes of state?

 

[Borek]

Not at a constant temperature. Google vitrification.