Vaporization is the act and consequence of vaporizing . East verb , meanwhile, may refer to transform a fluid into steam by heat or at spread a fluid in drops of reduced size.
Vaporization, therefore, may be the change of state from a liquid to a gas. This process can be carried out in two ways: when the passage of liquid to gas develops in the entire mass of the substance, we talk about boiling . Is called Boiling point , in this context, at the temperature that causes a liquid, at a certain pressure, to boil and begin to undergo the mentioned change of state; if the latter is only carried out on the surface of the liquid, the phenomenon is known as evaporation .
The enthalpy of vaporization , on the other hand, is the Energy which is needed so that a unit of mass of a liquid substance, which is at atmospheric pressure and in equilibrium with its vapor, is completely transformed into a gas.
For its part, the term enthalpy is defined as a magnitude thermodynamics whose variation serves to express a measure of the amount that a thermodynamic system has yielded or absorbed energy; In other words, the exchange of energy that it maintains with its surroundings. Enthalpy is symbolized by the H .
There is also the concept of heat of vaporization , which represents the necessary amount of energy to pass 1 gram of liquid to gas at the boiling point of the given substance. It is a value that must break the forces attractive intermolecular and provide enough energy so that the gas can expand.
When we face a ideal gas, after hot of vaporization, there should be no potential energy associated with these forces. In other words, internal energy must be molecular kinetic, in large part of translation, but also of rotation and of vibration.
One of the highlights of water vaporization is the great alteration suffered by its volume When it changes phase. Let's look at this in an example: if we take one mole of water (18 grams) and convert it to gas, we will obtain a volume of 22.4 liters; if, instead, we took it to 100 ºC, instead of 0 ºC, and transformed it into steam, its volume would be 30.6 liters.
If we compare the volume of evaporated water with that present in its liquid state, we notice a increase from 1,700 percent , that is to say, it happens to occupy 1,700 times more than before. This phenomenon is of great importance for fire departments, for example, since in certain cases it can cause explosions.
When the vapors are used with a medicinal purpose , reference is also made to vaporization. A person who goes to a hot spring area to breathe the mist , is appealing to vaporization.
Take the case of a subject who has a cold and who, due to this disorder, has difficulty breathing since he suffers from nasal congestion. With the intention of releasing your nostrils, you can heat water in a pot until it boils and inhale the steam . This vaporization will help improve breathing.
This technique can be very beneficial for our Health , but also for the care of our physical appearance. Vaporization is used in beauty treatments, to improve the skin of the whole body by cleaning certain external factors and preventing certain infections. By breathing the water vapor, the respiratory mucosa softens; At the same time, the parts of the skin that come into contact with the steam relax, their pores open and facilitate the removal of waste.