What exactly is the equivalent equilibrium of chemistry? As the title suggests, thank you

The amount of the starting substance is added differently, but after the reaction, the same state is reached, that is, the concentration of each substance is the same, and we call such several reactions equivalent equilibrium.

Chemical equivalent equilibrium: refers to two or more equilibriums with the same percentage content of each composition when the initial amount is not the same under certain conditions, but when the equilibrium is reached. According to the relationship between the reaction conditions and the sum of the gas metering numbers in the reaction equation, the equivalent equilibrium can be divided into three cases:

1. When the temperature and volume are constant, the sum of the gas metering numbers is not equal. If the equilibrium is equivalent, it must be exactly equivalent, i.e. the initial amount added is exactly the same after the conversion, and the equilibrium is equivalent.

2. When the constant temperature and constant rock are allowed, the sum of the gas measurement numbers is equal. If the equilibrium is equivalent, it is proportional equivalent, i.e., the initial added amount is in equal proportional relationship.

3. At constant temperature and pressure, regardless of whether the sum of the gas metering numbers is equal or not, it is "proportional equivalence".

Equivalence equilibrium is actually a method of doing problems.

There are three main categories to master in high school.

1.Constant temperature and constant volume equal volume reaction (equivalent reaction): refers to the fact that for this type of reaction, as long as the reactants do not change, the conversion rate and equilibrium constant do not change.

That is, n does not change, c does not change, and fai does not change (the quantity fraction of matter).

2.Constant temperature and pressure reaction: only n is required to form a multiple relationship to achieve the equivalent equilibrium, so c does not change, and fai does not change.

3.Constant temperature and constant volume equal volume reaction: N is a multiple relationship, that is, the equivalent equilibrium is reached, at this time, C is a multiple relationship, and FAI is still unchanged.

The sign of equilibrium is that the quantity fraction of matter does not change.

The best way to see if it is an equivalent equilibrium is to reflect the product reactants to the positive side of the reaction, and see if their relationship is equal or multiple, or neither.

Under certain conditions (constant temperature, constant volume or constant temperature and constant pressure), for the same reversible reaction, as long as the amount of substances added at the beginning is different, and when the chemical equilibrium is reached, the percentage content of the same substance is the same, such an equilibrium is called equivalent equilibrium.

The conditions for equilibrium are satisfied.

1) Isothermal isobaric.

Add reactants of the same fold.

For example, 2SO2+O2=2SO3, 2molSO2 and 1Molo2 are added at the beginning, and how much SO3 is added after equilibrium is added to meet the equivalent equilibrium. If you start with 3molSO2 and 1Molo2 and balance it with X's SO3, then you need to satisfy (3+X):(1+:

1 to meet the equivalent equilibrium.

Note: Valid for all reactions).

2) Isothermal isochoracic.

Add the amount of reactants of the same substance.

For example, 2SO2+O2=2SO3, 2molSO2 and 1MOLO2 are added at the beginning (AMOLSO2 and BMOLO2 remain after the reaction), and XMOL of SO3 is added after equilibrium, then the equivalent equilibrium can be satisfied only if the conditions (A+X)=2 and (B+X)=1 are satisfied.

Note: For reactions with m+nb=xc and m+n≠x), (3) isothermal isochorc.

Add reactants of the same fold.

Isobaric at the same temperature.

Note: For ma+nb=xc, and the reaction of m+n=x is effective)--

ps: After playing for a long time, it's more chaotic and will just watch it.

The equilibrium process is based on the quantitative relationship of different starting substances as the initial state of equilibrium, but when the equilibrium is finally reached, the state of each component in the mixture is the same!

i.e. equivalent equilibrium!

In general, there are two types of qualifiers for equivalence:

Constant temperature and pressure. or constant temperature and volume.

The reaction is carried out in different feeding methods (i.e., positive reaction, reverse reaction or starting from the intermediate state), as long as the percentage (volume fraction, quantity fraction or mass fraction) of each mixture is equal when the equilibrium brightness is reached** The exchange rate is also unchanged), such a banquet ridge chemical equilibrium auspicious dust is called equivalent equilibrium to each other.

Reversible reaction, extreme value conversion method.