Theme: Basic consepts of chemical reactions

Fergana Politechnic Institute
Faculty of chemical Technology Student of group 77-21

Independent work

In English of
Kimsanboyev Javohir
Theme: Basic consepts of chemical reactions.
Teacher: Parpiyeva M

Theme: Basic consepts of chemical reactions.


Plan:
1. Conditions of chemical reactions.


2. Types of chemical reactions.


3. Types of chemical bonds.

Conditions for chemicalreactions.

No incident occurs when a normal candle is outdoors, if it is heated using a match flame, a chemical reaction begins. Natural gas and natural gas and air do not interact indoors, but a small spark or emitting cigarette from an electric light connector can cause a strong explosion in the room. The piece of iron reacts slowly with the oxygen in the air (corrodes), and the piece of white phosphorus burns immediately in the air. we learn that the formation of specific new symptoms, the absorption or release of heat, is the basis for the occurrence of a chemical reaction.
Certain conditions must be met for a chemical reaction to take place: Heat must be given for some chemical reactions to take place. We analyze the above events: The candle remains unchanged in the air, but when the burning stick touches its beam, the candle liquefies (physical change) and begins to burn through the plug (chemical property) and continues to burn until it is extinguished. reaches In this case, in order for the heat transfer reaction to begin, then heat is released during the reaction and the reaction continues on its own. The same thing happens with wood, paper, and other combustibles. However, for some reactions, heat must be given off continuously, and if the heating is stopped, the reaction also stops: the decomposition of sugar is an example of such a reaction. The molecules of the substances involved in the chemical reaction must collide. The reactants are ground, powdered, or melted to a very fine particle to give them a high degree of contact and a high degree of solubility. In this case, it is very easy to carry out a chemical reaction. However, in most cases, it is not enough for the substances to come into contact with each other. will be needed. This means that chemical reactions do not happen by themselves. There are a number of conditions that must be met, as described above.