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Concepts and meanings of heterogenous
Meaning of heterogenousA heterogeneous system in chemistry is one that consists of two or more phases. He is identified by very simple reasons: you can see the different parts that make up the system, and in turn is divided into interfaces. It is a non-uniform matter which presents different properties according to the portion taken from it.
Granite is an example of a heterogeneous system, being constituted by a semi-transparent and hard granules, quartz, a few parts more soft and with a slight reddish tone, feldspar, and some dark and bright spots that exfoliate very easily.
Definition of heterogeneousThe word "heterogeneous" is used to refer to two or more things of different nature and characteristics. For example: students in the math class are performing heterogeneous way, because while topics covered are some easy, others produce greater difficulty. The word "heterogeneous" is the antonym of "homogeneous".
In chemistry, heterogeneous material systems are those whose intensive properties are different in any of their points, and because of this, show two or more phases. For example: a material system consisting of three components: sand, wood and stones, and hence three phases (sand, wood and stones), is heterogeneous because intensive properties, sand, wood and stones are different among themselves. A heterogeneous system also can consist of a single component, for example: If we have a system consisting of water in solid state (ice) and liquid (water), we can observe two phases, which do not possess the same intensive properties, therefore is a heterogeneous system.
Suspension is called heterogeneous material system consisting of a solid and a liquid; the first dispersed in the second. Heterogeneous material system consisting of two liquid phases (one scattered in the other) is called emulsion.
Phase separation methods:Heterogeneous systems often is useful the separation of the phases, for which there are different methods. Among them are the following:
The magnetization can be applied when in heterogeneous material system, one of the phases has magnetic properties. In this way, approaching a magnet heterogeneous material system, being attracted to him, the component of magnetic properties.
In the case of the separation of a solid and a liquid (the first insoluble in the second), must resort to the method of filtration, which must pass both components through a filter (can be paper, cotton, sand, among other materials), staying in this solid component, and passing the liquid component. This method is used to BREW noodles in households for example.
The screening is used when we want to separate two solid components but different in size. To do this both solid components through a sieve (mesh metal, resembling a kitchen colander), pass being trapped in the component of larger sieve, and through this, the smallest component.
Other methods of phase separation are the levigacion, centrifugation, dissolution, decanting of two liquids, and decanting of a solid in a liquid.
Concept of heterogenousFrom latin heterogenĕus, heterogeneous is that which is composed of parts of different nature. For Chemistry, a heterogeneous system consists of at least two phases. This feature can detect from a simple display, when the different components of the system are appreciated.
An example of heterogeneous system is granite or stone berroquena, an igneous rock that consists of quartz, mica and feldspar. Observing this stone, may notice their different granules and stains.
Heterogeneous systems, therefore, present intensive properties whose values differ in some of their points. There are heterogeneous systems that are even formed by single element, albeit with more than one stage (like a cube of ice floating in water).
(Consisting of a solid and a liquid) suspensions and emulsions (formed by two liquids) are two types of heterogeneous systems. It should be noted that there are various mechanisms for the separation of phases of these systems.
Filtration is the method that allows you to separate a solid from a liquid when the first is insoluble in the second. For this it is necessary to use some kind of filter that allows retaining solid while the liquid passes through small holes. Strain the juice of Orange to remove seeds is an example of filtration.
The screening, for its part, helps to separate two solid components of a heterogeneous system. The sieve is the element which functions as sieve and retains larger solid.
The magnetization, dissolution, centrifugation and decantation are other mechanisms that enable separate phases of heterogeneous systems.
What is heterogenousHeterogeneous is a term that he describes the State of a composition when this is comprised of deferred elements of nature among if. A heterogeneous compound has features of possible separation, these mechanisms are defined based on the type of mixture. The implementation of this type of compositions are given by the need that you have, this tells us a countless variety of processes in which the result is heterogeneous. The most common heterogeneous compound types are: emulsion and suspension.
Heterogeneous compositions have the Faculty of making that an element that only meets a role in specific, for example, the glass this composed of sand, and the sand to turn by itself contains many types of rock in its structure, fragmented manometricamente forming a soft layer of dust, but separately possessing another structure. Heterogeneous mixtures may vary its shape depending on the State in which components are located. That is why that the mix like water with Earth, if you add in more land, will occupy most of the molecular space, making it a composition with more solid state liquid.
Emulsions are heterogeneous mixtures formed by two liquids, the reasons why does not complete homogeneity in a mixture with two liquids is by their concentrations are not the same, this will affect the way as the mixture is done, for example if we combine in a single container water with oil, the latter to appreciate in small bubblesThis is due to the acuity of oil is greater than the water, this combination allows not to be homogeneous in its entirety.
Suspensions are heterogeneous mixtures between a solid and water, the main characteristic can be seen in its name, usually the solid part of the substance is suspended above the liquid, we return to the same explanation above, the physical properties including concentration, not allow the substance be compacted fully. In many cases, is the part liquid who dominates in the mixture, however there are situations in which the solid is who contains oozes it, gives shape, character and determining role.