In which of the states is the internal energy greater, and in which less – in solid, liquid or gaseous?

Internal energy is the aggregate of the kinetic energy of all its molecules and the potential energy of their interaction.

A substance in a solid state retains all its characteristics: volume, weight, shape.

At low temperatures, a substance freezes and turns into a solid, while changing its shape, weight, etc.

The gaseous state is characterized by the fact that they do not retain either volume or shape, but at the same time the gas fills the entire volume offered to it.

Consequently, of the three aggregate states with a greater internal energy there will be a gaseous state, and with a lesser one – a solid state.