Category physical properties - one of the largest synthetic concepts that characterize an extensive range of properties of substances, objects and phenomena, without which the human cognitive activity is unthinkable.
In the broadest sense, these properties characterize all non-chemical properties of the substances, that is, those that are inherent in the substance without taking into account its interaction with other substances.
These include properties such as performance melting and boiling points, heat capacity and thermal conductivity, density of matter.By electrophysical properties include inductance, thermal conductivity and permittivity.Very important are the properties such as absorption, color concentration.
important condition understanding of physical properties and characteristics of the area which they reflect, played by the fact that the substance may be chemically neutral and stable only in the case where the structure is stable, and its molecular structure.This is important because, even if in the same aggregate state, the physical properties of the material may be different.These differences are due to a variety of circumstances, such as crystal structure, finding it as part of a solution, and others.
Without exception, all substances found in nature have physical properties that define the role and place it in natural processes.For example, the melting point (this property is often cited as references in the solidification temperature), is the threshold temperature at which solid crystalline body can pass into the liquid state.In this definition, it is important to understand that a key word is the word "can", that is, it means that at a given temperature, the substance may be either in the liquid state and in the solid.However, if this temperature increase somewhat, the substance certainly go into a liquid state, and accordingly - vice versa.This physical characteristic of substances closely related to another feature - a boiling point, but these properties become identical only in the case when it comes to a pure substance.
If we consider the physical properties such as conductivity, electrical conductivity, related to the electrical sub-group, it should be said that these properties characterize the ability of the human body electric current flowing through itself.Depending on this, those bodies which conduct electrical current, called conductors, and those that do not allow - dielectrics.Based on the physical characteristics of the data, we can immediately conclude chemical properties.In conductors are always free electric charge carriers, but dielectrics such may not have.This statement suggests that the physical properties are closely connected with the properties of chemical, and they mutually cause each other.
With physical parameters can be described as a huge number of substances and objects that surround us in nature.For example, the basic physical properties of nitrogen - a substance that is a major component of the air we breathe, are as follows.
Nitrogen is a colorless gas, which has a melting point equal to -210 ° C, and at a temperature of -196 ° C, the nitrogen boils.Nitrogen is soluble in water and has a density of 0.0012506 g / cm3.The dielectric constant equal to 1.000528 nitrogen at a temperature of 25 ° C.
Or, for example, the physical properties of ozone, characterized by such indicators.Ozone - it is also a colorless gas with a characteristic odor and flavor, in the liquid state, it acquires a dark blue color and becomes black solid.The melting point of ozone is -192.7 degrees and boils it at -111,9 ° C.Ozone is soluble in water, has a dielectric constant of 1.0019 (at 0 ° C), and has a density of 0.002144 g / cm3 (at 20 ° C).
