- What is an isolated system?
- Characteristics of an isolated system
- Examples of isolated systems
- Open systems
- Closed systems
We explain what an isolated system is, its characteristics and various examples. Also, what are open and closed systems.
What is an isolated system?
In physical thermodynamics, an isolated system is understood to be those systems in which there is no exchange or matter nor of Energy with the environment, due to the action of some type of barriers that allow the conservation of system resources, while preventing the entry of resources from outside.
In this they are distinguished from closed systems, which in the same field of physics are capable of exchanging energy with the environment (but not matter), and even more so of open systems, in which the exchange of both things occurs freely.
According to General systems theory emerged in the mid-twentieth century, a system is a portion of the universe that, for study, is considered separate and delimited from its environment. This perspective is used both in natural Sciences like in social Sciences.
However, it is mostly in the realm of physics that the term isolated system is used. Its operation, in this area, is determined by the Conservation Laws, according to which certain magnitudes remain constant within an isolated system, at least for a time. This applies to both mass, Energy, electric charge, angular momentum and linear momentum.
Characteristics of an isolated system
Isolated systems are characterized by the following:
- They have barriers of some kind, known as insulators, which significantly and notoriously limit the exchange between the inside and the outside.
- As long as they remain isolated, their resources and properties remain constant and stable, that is, invariable: nothing comes out and nothing comes in, or at least not in significant proportions.
- There is neither total insulation nor perfect insulators: they all have some margin of loss or leakage, but in many cases this margin is usually negligible or insignificant during the study of the system.
- In many cases, the insulation produced in the system is temporary, and given the sufficient amount of weather, your margin of loss or inaccuracy is highlighted.
Examples of isolated systems
Possible examples of an isolated system are the following:
- A thermal container that maintains the temperature of the substances, like a beach cava or a thermos for hot coffee.
- Winter clothing that isolates us from cold air and therefore prevents us from losing body heat at a noticeable rate.
- The electrical conduction cables that are covered with material insulating (rubber or plastic) to minimize the loss of electrical power in the transit to our homes (and, also, that some passer-by is electrocuted).
- The rubber boots that we use to walk in a flooded terrain, or in the snow, that prevent the entry of water to our feet.
Open systems
Open systems are those that freely exchange information, matter and / or energy with the environment, without there being limits or barriers that significantly restrict the transit between the inside and the outside. They are, therefore, systems of infinite but external resources, which are in constant connection with the environment.
Closed systems
Closed systems are those in which there is no exchange of matter between the inside and the outside. Therefore, they have limited but their own resources. However, it may or may not exchange energy with the environment. In practice, closed systems are much more frequent than isolated systems.