Is the taste and smell of molecules physical or chemical?

The taste and smell of molecules are physical properties, and you can taste the taste because of the reaction you say.

The physical properties in the supplement generally refer to their melting and boiling point, etc., and not to the taste.

Politics is the most important thing to see a person's mind and flexibility!

History is the most visible way to see a person's thinking and point of view!

Geography is the best way to see a person's ability!

Liberal arts knowledge is the summary and deepening of humanities knowledge, social science knowledge and thinking science knowledge throughout the ages, and is the backbone and fundamental guide for people to understand and transform society

The fundamental role of liberal arts knowledge is to improve the quality of the people, improve the national personality, and enrich the national feelings

If you study liberal arts well, you can "participate in the mystery of the three talents and test the sense of the gods";Those who study liberal arts well know astronomy and geography, and they can read the past and the presentThose who study liberal arts well, learn from the past and know the present, and better grasp the pulse of the development of the times and the direction of personal progress!

Although the liberal arts have high requirements for comprehensive and profound thinking, analysis and generalization skills, knowledge transfer skills, language skills, and the ability to associate and apply principles and concepts, and although the politics, history, and geography of the liberal arts are particularly difficult to learn, there are still many outstanding students who are forging ahead, bravely climbing the peak, and challenging the glory of the liberal arts, which is very worthy of recognition.

Nowadays, there are many science majors that are the top students in the college entrance examination, such as economics, education, psychology, sociology, law, management, political science, logic, regional studies, etc. There is such a saying:

Fourth-rate science students choose biology, third-rate science students choose chemistry, second-rate science students choose physics, and first-class high-end science students go to liberal arts!

Reason: Physical properties refer to the properties that are directly manifested without chemical changes. Example:

In its usual state, oxygen is a colorless, odorless gas. Physical properties such as: color, state, gas, melting point, boiling point, hardness, etc.

Neither the matter changed before or after the experiment. These properties are all physical properties. So the smell of the substance is a physical property.

Whereas, chemical properties are the properties of substances that manifest themselves in chemical changes, for example, iron forms rust in moist air, and copper can form patina in moist air. Chemical properties can only be expressed through chemical changes.

The smell is a special smell of the chemical substance, so it belongs to the chemical information.

Distinction between physical and chemical information:

Changes in physical factors such as sound, light, and electromagnetism contain physical information, chemical substances and hormones contain chemical information, physics is generally sound, color, light, etc., and chemistry is the secretion and transmission of substances.

The smell of a substance (which does not require a chemical change to manifest itself) is a physical property.

Physical properties are properties of matter that do not need to undergo chemical changes, and the physical properties of substances are usually studied by observation and measurement.

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 properties.

Physical properties and chemical properties are only pseudo-definitions in the first year of junior high school Smell and taste can only be felt by the chemical reaction that occurs between the receptors and molecules in the human body.

Odor is a special taste emitted by a chemical substance, so it is a chemical information.

Distinction between physical and chemical information:

Changes in physical factors such as sound, light, and electromagnetism contain physical information, chemical substances and hormones contain chemical information, physics is generally sound, color, light, etc., and chemistry is the secretion and transmission of substances.

Among the properties of an object, smell is physical information.

The wolf preys on the scent left by the rabbit as a chemical message.

To understand this question, you first have to understand what smell is. When a substance is placed in the air, it will emit some small molecules through volatilization or reaction with air (mostly oxidation) or its own internal reaction, which bind to special protein receptors in the human nasal cavity to produce some nerve signals, which become the smell we know after being processed by the brain and the army. Secondly, we need to define what are physical properties and what are chemical properties, and there is no clear definition of these two properties in academics, so in the final analysis, we still have to put it into specific problems.

The subject should be aimed at physical chemistry in middle and high school, at this stage, chemical properties refer to the properties that are exhibited in the process of chemical reactions with other substances, and almost all other properties are classified into a vaguely defined physical property, or one or the other. So is odor a property of a substance in the process of chemical reaction with other substances? This involves another problem of drilling grammar, which is the process of reaction, that is, it does not consider the state before the lead removal (itself), nor the state after the reaction (result).

Then the smell, as mentioned before, its ** either comes from its own volatilization (itself), or the product after the reaction (result), so nature does not belong to chemical properties, then it can only be assigned to physical properties. As for the smell you mentioned, the odor molecule and the protein receptor are simply "sticky" together, and there is no chemical reaction, as for what will happen to the molecule after that, it is far after the nerve reacts, and it has nothing to do with the smell. Beg.