What are physical properties? Please, what are the physical properties

Hello 1 There are two definitions of physical properties, one refers to the properties that matter does not need to undergo chemical changes, and the other refers to the properties that matter exhibits without chemical reactions are called physical properties.

For example, the physical properties of substances such as color, smell, form, whether it is easy to melt, solidify, sublimate, volatile, etc., can be perceived by people's ears, nose, tongue, body and other senses, and some properties such as melting point, boiling point, hardness, electrical conductivity, thermal conductivity, ductility, etc., can be measured by instruments. There are also some properties that can be calculated through laboratory data, such as solubility, density, etc.

Neither the matter changed before or after the experiment. These properties are all physical.

such as the evaporation of water; The candle is soft, not easily soluble in water, and the paraffin wax is generally white; paper shredding, etc. The properties that can be manifested without chemical change are physical properties. The properties that are manifested by chemical changes are chemical properties.

Hope it helps.

Definition: A property that does not need to undergo a chemical change is called a physical property.

Physical properties: are inherent properties of the object itself. Examples: density, boiling point, melting point, hardness, color, etc.

Judgment: The properties that can be known through the senses, the glasses can see the color, the nose can smell the smell, the hands can feel the hardness, you see that the substance is black, you smell the fragrance, and it is hard to the touch with the hand, then the physical properties of the substance are: black, with fragrance, hard.

This is not to check the information, it is personally typed, I hope it can help you!

The properties of a substance that do not need to undergo chemical changes are called physical properties, which usually include the color, state, odor, hardness, melting point, boiling point, density, etc. of the substance. When the external conditions change, the properties of the substance will also change, so the conditions should be indicated when describing the properties of the substance.

The properties that matter exhibit without a chemical reaction are called physical properties. Neither the matter changed before or after the experiment. These properties are all physical properties.

1. Such as: color, smell, shape, whether it is easy to melt, solidify, sublimate, volatilize, etc., can be used to use people's ears, nose, tongue, body and other senses to perceive;

2. Such as: melting point, boiling point, hardness, electrical conductivity, thermal conductivity, ductility, etc., which can be measured by instruments;

3. Such as: solubility, density, etc., can be obtained through the real travel laboratory data, calculation.

Categories: Education Academic Exams >> Gaokao.

Analysis: Physical properties.

Physical properties are properties that can be exhibited by substances without chemical changes, such as color, state, odor, density, melting point, boiling point, hardness, solubility, ductility, electrical conductivity, thermal conductivity, etc., which can be sensed or measured by instruments.

Chemical properties are the properties of substances that exhibit in chemical changes. For example, the chemical properties of the substance category: acidic, alkaline, oxidizing, reducible, thermal stability and some other properties.

Hint: Chemical properties and chemical change are two different concepts, property is the property of matter, is the internal cause of change, and property determines change; The change is the specific manifestation of the property, and the chemical property can only be revealed in the chemical change. For example, alcohol is flammable, so when you ignite it, the chemical change of alcohol combustion can occur; Whereas the flammability (chemical properties) of alcohol is a conclusion drawn through the phenomenon of countless alcohol burns.

Since it is a chemistry subject, physical properties are often ignored in the learning process, but in fact, physical properties are also very important for the learning of chemistry. Chemical identification, separation, purification, inference, and selection of gas production and gas collection devices all require reference to the physical properties of the substance. Therefore, students should pay enough attention to their studies.

Physical properties can be classified into implicit and epitaxial properties. Contained properties are independent of the size of the system or the amount of matter, while epitaxial properties have additive properties. Properties can also be classified according to their directional qualities.

Isotropic properties mean that properties do not change with the direction of the observer, while anisotropy changes with the direction of the observer.

Physical properties are a professional term in physics, which has two definitions, one refers to the properties of substances that do not need to undergo chemical changes, such as: color, smell, etc.; The second refers to the properties of substances that are exhibited without chemical reactions, such as melting point, boiling point, etc. Physical properties belong to the category of statistical physics, that is, physical properties are properties exhibited by a large number of molecules, not by a single atom or molecule.

The physical properties of substances such as color, odor, state, whether they are easy to melt, solidify, sublimate, volatile, and some properties such as melting point, boiling point, hardness, electrical conductivity, thermal conductivity, ductility, etc., can be measured by instruments. There are also some properties that can be calculated through laboratory data, such as solubility, density, etc.

Neither the matter changed before or after the experiment. These properties are all physical.