What happens to the particles and energy of a substance as it changes temperature or changes state.(solid to liquid to gas) and vice versa :(gas to liquid to solid.

When changing state of aggregation, the particles change their kinetic energy, decreasing or increasing, if their kinetic energy decreases the collision between the particles is less, and therefore less heat is released and more space will exist between them, this is an example of the states of aggregation that occupy large expandable volumes such as gas.

As the particles get closer, the molecules are closer and collide in a greater way, thus generating that the kinetic energy increases, the friction also and these particles are closer to each other, compressing the space and limiting their movement up to a point.

Explanation:

The states are three, solid liquid and gaseous-

In the solid state there is less distance between the particles, greater density of the body and greater force of friction or collision.

On the other hand, in the solid state the particles are more distended but up to a limit they expand, different from the gaseous state that their particles expand more and without a limit.

The states are modified according to the different temperatures that the body undergoes, at a higher temperature a higher kinetic energy and greater friction are usually reached, generating relaxed states such as liquid and gas, and at lower temperatures it is the reverse effect.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.