Question

Which has the least energetic molecules and why?
(A) Solids
(B) Liquids
(C) Gases
(D) Plasmas.

Answer 1

Hint: Every particle has energy, however the amount of energy changes based on the temperature of the matter sample. The condition of the material is then determined by whether it is solid, liquid, or gaseous. Molecules in the solid state have the least amount of energy, whereas gaseous particles have the most. The average kinetic energy of the particles is measured by the temperature of a material. When the energy of the particles is altered, the phase of the particles may change.

Complete answer:
A material can exist in three different physical states: solids, liquids, and gases. The arrangement of the molecules and the forces between them varies. Every substance's molecules have two forms of energy: kinetic energy and potential energy. Kinetic energy is created as molecules move. The arrangement of molecules in solids, liquids, and gases differs significantly. The molecules in solids are very tightly packed due to the high attraction or van der-waal forces. Because the molecules have very little room to move around, the pressure is quite high. The molecules in liquids are quite near to one other, but not as close as they are in solids. The wander-vaal forces are weaker, allowing molecules to flow more freely. The molecules in gases are far apart, and the forces between them are virtually non-existent. The wander-vaal forces are the most vulnerable.
Solids have the lowest kinetic energy since they cannot move and can only fluctuate about their mean position. While liquids have greater kinetic energy than solids, their molecules undergo convection and so have kinetic energy. Gas molecules have the most kinetic energy because they have random motion and travel at very high speeds.
As a result, gases have the highest kinetic energy, liquids have a lower kinetic energy, and solids have the lowest kinetic energy.
Hence option C is correct.

Note:
The kinetic energy of a substance increases as the temperature rises because their energy rises when heat is applied. Solids have a definite shape and are hard, but liquids and gases take on the shape of the container. Because of the kinetic energy of their molecules, liquids and gases exert pressure on the container's walls.