How does changing the energy of a substance determine its state of matter?

Changing the energy of a substance also changes its phase. The higher the energy of a substance, the more likely it will turn into gas. On the contrary, the lower the energy of a substance, the more likely it will turn into solid.

Explanation:

The answer is related to Ron Kurtus' Kinetic Molecular Theory of Matter.

Kinetic - relates to motion.

Kinetic energy - the energy of an object that is in motion.

Phases of Matter - Matter can be classified into three phases: solid, liquid and gas. It is made up of particles.

All matters have energy, but it depends on the temperature in it. Whenever a change in temperature happens, the matter's phase also changes. Solids have tighter spaces because its particles are located close to each other than liquids or gases. It is considered to have the least amount of energy. Gases have wider spaces than the other two. It is considered to have the highest amount of energy. Remember that the temperature determines the kinetic energy of the matter. The higher the temperature, the more energy involved while the lower the temperature, the lesser the energy involved.

Let's consider the sample of an "ice water," which is solid. When heat is applied to ice water, the particles of the ice starts spreading, thereby causing more wider space for the particles. This can then change the phase of the matter. If it will be completely heated and water evaporates, thus it becomes gas.