Question

What is the relationship between the kinetic energy of molecules and their physical state?

Answer 1

Hint: Before starting this question, we must know about Kinetic energy. We must exert force on an object to accelerate it. We have to put up the effort to use force. Energy is transmitted when work is done on an object, and the thing then moves at a new, constant speed. The energy that is transported is referred to as kinetic energy, and it is influenced by the mass and speed attained.

Complete answer:
Heat is referred to as "Kinetic Energy of Molecules," in scientific parlance. Heat energy is kinetic energy that is held in the motion of a substance's molecules. Phase could be referred to as "Physical State." In that scenario, the solution is obvious: the phase shifts from solid to liquid to gas when the energy surpasses a predetermined limit. Other alterations, such as the dissociation of the substance's constituent molecules, are likely to take place at certain temperatures.

You can think of all of these changes as average energy crossing certain thresholds. Molecules are held together in a solid by intermolecular forces. These forces have a certain amount of energy inherent in them (hydrogen bonds, Van der Waals forces, etc.).

The substance will melt if the amount of thermal energy is too high to overcome the energy needed to break these "bonds," forming a disordered collection of molecules that are still electrostatically connected but free to move around in relation to one another. Therefore, the heat of fusion (enthalpy of fusion, to be precise) is only the energy needed to cause the fusing of a given mass of any given solid.

Note: You might find it interesting to know that every object in the universe changes states. It just depends on how much heat is applied to the substance. Everything on our planet can be manipulated to change state if you apply enough heat. The fact is, not all substances must proceed in a solid-liquid-gas fashion. Some compounds have the ability to naturally transition from the solid to the gaseous state without going through the liquid phase. This condition is referred to as sublimation.