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Please explain the following questions with the knowledge of structural theory (1) In general, organic compounds have low melting and boiling point, low density, volatile and soluble in organic solvents (2) Under normal circumstances, the rate of organic matter participating in the reaction is small, and by-products are produced
1. It is incorrect to say that the boiling point and density of organic compounds are low. Only most organic compounds with small molecular weight have low boiling point and are easy to volatilize. However, some organic compounds with large boiling point, such as ethanol, have high molecular weight because of hydrogen bonds between ethanol molecules
2. Most of the organic reactions are electron pair transfer, and the atoms of the molecules forming organic compounds are covalent bonds, which are very stable, and many of the bond energies are similar, so the reactions are slow and there are many side reactions
The bleaching principle of sodium peroxide,
Sodium peroxide is easy to absorb moisture. When it reacts with water or dilute acid, it generates hydrogen peroxide and releases heat. Hydrogen peroxide is unstable and decomposes to release oxygen. Therefore, heating sodium peroxide solution releases oxygen, but hydrogen peroxide does not decompose completely, so the solution has bleaching property
It contains
Na2O2 + H2O = 2naoh + H2O2, hydrogen peroxide can fade
And 2na2o2 + 2H2O = 4naoh + O2
Thevenin theorem
Is it to remove the load of the original circuit, and then leave the equivalent active two terminal network, which is equivalent to a voltage source and resistance in series, and finally add the load?
Does Thevenin consider the situation when the load is removed and the open circuit is acted as a voltage source and a current source separately
The theory of Thevenin's theorem
1. The load of the original circuit is removed, and then the remaining part is equivalent to an active two terminal network. The two terminal network can be a voltage source and a resistor in series, or a current source and a resistor in parallel
2. Add the load at last
A brief explanation of Thevenin theorem
Please help me to explain the god horse is - Thevenin theorem
Please use the simplest and most rustic language to explain. If you can't understand the technical terms, don't copy a paragraph in Baidu Encyclopedia. If you want to understand it, don't look for you
"For an external circuit, a two terminal linear network with a source can be replaced by a power supply. The electromotive force EO of the power supply is equal to the open circuit voltage of the two terminal network, and its internal resistance ro is equal to the equivalent resistance (input resistance) at both ends of the network when all the electromotive forces in the two terminal network with a source are 0, which is called Thevenin's theorem."
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In particular, this sentence is really puzzling. I don't know what he wants to express
If you take any circuit and connect two wires at any place, you can regard it as a voltage source. The two most important parameters of voltage source are electromotive force and internal resistance. How to determine these two parameters? This is what Thevenin's theorem says
RELATED INFORMATIONS
- 1. By using Thevenin's theorem and Norton's theorem, the graphic circuit is transformed into an equivalent voltage source and an equivalent current source, and the solution of open circuit voltage uo and short circuit current is explained I understand,
- 2. The reason of error in the experiment of verifying the correctness of Thevenin's theorem and Norton's theorem May I ask why there may be errors when doing experiments to verify the correctness of Thevenin's theorem and Norton's theorem
- 3. Why do Thevenin's theorem and Norton's theorem have different zero setting methods for voltage source and current source when calculating equivalent resistance? one
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