Question

Molecules in the __________ phase have the least amount of energy.

Answer 1

1. In solids, the particles are closely packed.
2. There is a strong force of attraction between holds them together in fixed positions.
3. Thus, the positions of particles in a solid are fixed.
4. The particles of a solid only vibrate about their fixed positions. They cannot move from one position to another.
5. Because of this, molecules of the solids have the least kinetic energy.
6. Due to this, solids have the most orderly arrangement of particles.

Thus, the molecules in the solid phase have the least amount of energy.