Vapor is the state in which a is a gas when it is at a level below its critical point; It refers to the pressure and temperature conditions above which it is impossible to obtain a liquid by compression. If a gas is below this point, it means that it is susceptible to condensation by reducing its temperature (maintaining constant pressure) or by pressurizing it (with constant temperature).
It is important to clarify that a gas is a substance that meets a well-defined characteristic: it does not have its own shape or volume. This allows it to conform to the shapes of the containing element or to scatter if no content is found. In some special cases, such as steam, this gas can be condensed to facilitate handling; however, this is not a characteristic that all gases possess.
Vapor is the gas that is obtained by boiling (physical process by which the entire mass of the liquid passes into a gaseous state) or by evaporation (the same process, but which can be carried out at any temperature and without the entire mass of the liquid liquid reaches the boiling point) of liquid water or the sublimation (change from solid to gaseous state) of ice. This vapor is odorless and colorless. Steam locomotives Since the Industrial Revolution there have been many advances in the life of societies. Among them was the invention of steam as a source of energy for means of transportation; This is how the steam locomotive arose, which allowed movement thanks to the energy from the combustion of components such as coal or fuel oil in a boiler. Then the water was heated and when it reached boiling temperature it generated a certain pressure that moved the pistons that were connected to the wheels; these began to rotate and caused the wagon or locomotive to move rhythmically. The first steam locomotive was conceived by Richard Trevithick in 1804 and managed to move five wagons loaded with steel (10t) and passengers (70 people), at a speed of 8 km/h. He is credited with the creation of this means of transportation, which meant an inevitable leap in the development of societies.
But there are many other names related to the steam locomotive and advances in means of transportation, two of them are: * John Blenkinsop – He was the one who designed the toothed rails so that the wheels of the locomotive were fixed and could move safely . This model has been used for many years and the current design of all rails is derived from it.
*George Stephenson: It was he who improved the combustion engine, creating the first modern steam locomotive that distributed heat more efficiently. He was given the name Rocket and his working system was also used in later locomotives.
But finally, when locomotives that combined diesel and electric systems, based on the internal combustion of oil, appeared at the beginning of the 20th century, steam locomotives fell into disuse. It is also worth mentioning that in the past many ships were powered by steam engines. These ships had boilers or steam turbines and chilled water condensers that allowed them to move without depending on currents or winds. Thanks to steam, the first transatlantic ships were created. Currently, there are no more ships using this method of propulsion.
