OursHigh school chemistryFive coursesChemical response principlesIt's a piece of balance that's taken a lot of students, and it's making us look like we're cutting, and we're messing up, and there's something going on. It's actually a part of something that comes out of the most fundamental --The lechartley doctrineAlmost all the issues of balanced movement can be interpreted and judged in the context of the lechard doctrine, which is applied in a way that is based on a good grasp of its nature and content, as well as a good understanding of the circumstances, which we will understand in the following concrete ways。
I. Rationale:
Leachettel doctrine: if a condition affecting the balance (e. G. Concentration, pressure or temperature) is changed, the balance moves in a direction that reduces the change。
Content:
(1) concentration: increases in the concentration of a reaction in the direction of reducing the concentration of the reaction, i. E. In the direction of positive reaction, and decreases in the concentration of a product, in the direction of increasing the concentration of the product, i. E. In the direction of positive reaction。
(2) pressure: increases the pressure of a gaseous reaction in a direction that reduces the pressure of the reaction, i. E. In a positive direction; reduces the pressure of a gaseous generator in a direction that increases the pressure of the product, that is, in a reverse direction。
(3) temperature: an increase in the reaction temperature is occurring in the direction of a decrease in the heat, i. E. A reversal in the discharge reaction and a reaction in the direction of the ingestion reaction; a reduction in the temperature is occurring in the direction of the generation of the heat, i. E. The discharge reaction is proceeding in the direction of a reversal in the ingestion reaction。
(4) catalyst: change only the speed at which the reaction is carried out does not result in a balanced movement, i. E. The same degree of impact on the reverse reaction。
Now let's get to the field exercise。
Topic 1:
A. Absorption of less than akj if 1molfe is generated
B. If the temperature rises, the positive rate increases and the reverse rate slowsChemical balanceMoving towards
C. If the pressure in the container does not change over time, the reaction can be judged to have reached chemical balance
(c) (co2) = 0. 0263 (mol/l)
Dialysis: based on the thermal response equation in the subject, it is known that the reaction of the reaction is thermal ingestion and the reaction of the reverse is thermal insulation, and that option b of the subject relates to temperature and balance movement, so that the chemical balance is moving in the direction of heating if the temperature rises and the reaction moves in the direction of inhalation, but the effect of the higher temperature on the rate of the reaction is increasing, so item b is wrong
Question 2:
At a certain temperature, the following reversible reaction occurs in a closed container with a fixed volume:
X, y, and z, in balance, 1mol, 1mol, 2mol, keeping the temperature constant, then filling containers with 1mol, 1mol, 2mol x, y, and z, respectively, is correct in .
A. Reaction rate v (positive) reduced and v (reverse) increased at first filling
The average relative molecular mass of the gases in the packaging is increased when the new balance is achieved
C. When the new balance is reached, the pressure of the gas inside the packaging is twice as high as it was
D. When the new balance is reached, the percentage composition of the gas in the packaging is twice as large as the previous one
Anticipatory: it is understood that the process is a process that is filled with a certain amount of x, y, and z gas under conditions of temperature, so that the pressure of the system will increase, and the reaction will be in the direction of reducing the pressure of the system, i. E., moving in the direction of a small coefficient, so the reaction is moving in a positive direction, and the analysis of the options starts with this premise.
The response rate of option a is a problem where the concentration of the reactor, the generator, is increased when it is filled, both positive and counter-reaction rates are increased, so error a; balance moves in the direction of positive reaction, the volume of the total mass of the mixed gas is reduced, and the total mass of the mixed gas remains unchanged, so the average relative molecular mass of the gas inside the container is increased, error b; if the balance is not moved, the pressure is two times greater, but the balance moves in the direction of the positive reaction is less than two times greater, so error c; balance moves in the direction of positive reaction, the percentage composition of the gas inside the container changes, so error d.
From the above analysis, it can be seen that some of the situations that usually occur are within the framework of the lechard doctrine. Thus, when we encounter problems involving balanced movement, the right answers can be found if the lechartley doctrine is correctly used for analysis, and if we really understand that it can be applied, we can certainly deal with all kinds of balanced topics。
