Are gas to gas reactions both reversible?

No. Characteristics of reversible reactions: The reaction cannot be carried out to the end. No matter how long a reversible reaction is underway, it is not possible to convert all reactants to the product 100%.

The reaction of H2 and O2 can all be reacted into water. 2h2+o2=2h2o

The confrontational response is also called the reversible reaction. Under the same conditions, the reaction that can be carried out in both the direction of the positive reaction and the direction of the reverse reaction is called a reversible reaction.

Peculiarity. 1. The reaction cannot be carried out to the end. No matter how long a reversible reaction is underway, it is not possible to convert all reactants to the product 100%.

2. The reversible reaction must be a reaction that can be converted into each other under the same conditions, such as sulfur dioxide and oxygen under the condition of catalyst and heating to generate sulfur trioxide; Sulphur trioxide can be decomposed into sulphur dioxide and oxygen under the same conditions.

3. In the ideal reversible process, there is no friction, resistance, hysteresis and other resistance, so there will be no loss of work.

4. Reactions that occur at the same time.

5. Increase and decrease at the same time.

6. When writing the chemical equation of reversible reaction, double arrows should be used, and the substances on both sides of the arrows are reactants and products of each other. A left-to-right reaction is usually referred to as a positive reaction, and a right-to-left reaction is called an inverse reaction.

7. Two chemical reactions in a reversible reaction are carried out in opposite directions at the same time under the same conditions, and the two chemical reactions constitute an opposing unity. Two chemical reactions that can be carried out in opposite directions under different conditions cannot be called reversible reactions.

1) "Inverse": The object of chemical equilibrium research is reversible reactions.

2) "Equal": The essence of chemical equilibrium is that the positive and reverse reaction rates are equal, i.e.: v (positive) = v (inverse). 3) "Moving": v (positive) = v (inverse) ≠0

4) "Fixed": In the equilibrium system, the concentration, mass fraction and volume fraction of each component remain certain (but not necessarily equal) and do not change with time.

5) "Change": The chemical equilibrium is the equilibrium under certain conditions, and if the external conditions change, the chemical equilibrium may move by fractions.

6) "Same": Under the premise that the external conditions remain unchanged, no matter what path the reversible reaction takes, that is, whether it starts from the positive reaction or the reverse reaction, the final equilibrium state is the same, that is, the same equilibrium state.

The essential characteristic of a reversible reaction when it reaches equilibrium is ·=, that is, the rate of formation of a substance per unit time is equal to the rate of its consumption. The external characteristics are: the amount of the substance of each substance is constant; The concentration of each substance does not change; The percentage content of each substance remains the same:

The amount of total matter does not change: the average molecular weight of the gas mixture does not change; If the temperature and volume are fixed, the total pressure in the reaction vessel remains unchanged. (Note:.)

For the reaction before and after the reaction where the number of molecules of the gas substance is equal, it can be reversed, such as h:+1:a 2m, which cannot be judged by , ).

3.The law of equilibrium.

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 to the substance 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, and the law of such equilibrium is:

1) Under the condition of constant temperature and capacity, for the reversible reaction with unequal number of gas molecules before and after the reaction, only the amount of substances added at the beginning is changed, if the amount of substances converted into the same half of the substances by the stoichiometric ratio of the reversible reaction is the same as the original equilibrium, the two equilibrium are equivalent.

2) Under the condition of constant temperature and volume, for the reversible reaction where the number of gas molecules does not change before and after the reaction, as long as the proportion of the amount of the reactant (or product) is the same as that of the original equilibrium, the two equilibrium are equivalent.

3) Under constant temperature and pressure, the amount of substances added at the beginning of the change is equivalent to the original equilibrium as long as the ratio of the amount of substances converted into the same half of the substances according to the stoichiometric number is the same as the original equilibrium.

4. The electron flow direction of the electrolytic cell: the electron is from the negative electrode of the Chenxiang power supply, the cathode of the electrolytic cell, and then by the electrolyte solution, the anode of the electrolytic cell, and the positive electrode of the power supply. ionic in solution.

Direction of movement: The cations in the solution move towards the cathode, and the anions move towards the positive.

Whether the pressure change has an effect on the rate is actually to see if there is an effect on the concentration, and if the pressure change causes the concentration of a substance to also change, then the rate will also change.

When the reaction you wrote about increases the pressure, the reactant is solid, and the concentration does not change, so the positive reaction rate does not change, but the carbon dioxide in the product is a gas, and its concentration will increase, so the reverse reaction rate will increase.

In addition, if the volume of the reaction with gas is unchanged, the pressure in the container will increase when inert gas is added, but the concentration of each substance in the reaction system will not change, and the rate will not change.

Here it is necessary to figure out whether it is a forward rate or a reverse rate, after pressurization, the forward rate does not change, but the reverse rate definitely increases.

It doesn't matter, you have to read more books.

10,000 Years of Fireflies Chi Zijian One night in Zhangjiajie, I was very eager to be alone for a while. I walked towards a dense jungle, and when I found that I had gotten rid of the lights and human voices behind me, a bamboo forest under the stars and moon accepted me. I brushed aside the knee-deep artemisia grass and sat in the bamboo forest.

The air in the bamboo forest is so good that I feel that God is also breathing with me here, the stream of the mountain stream.

When isobaric, the addition of inert gas will increase the volume, and the reaction will move in the direction of large gas coefficient, while the concentration of reactants will be lower and the reaction speed will be slowed down. When the reaction gas is added, the situation is divided into several types and should be analyzed separately. When isovolumetric, inert gas is added, although the pressure of the system increases, but the concentration of reactants does not change, so it has no effect on the reaction; When the reaction gas is added, the concentration of reactants is significantly increased, the reaction moves to the positive direction, and the reaction speed is accelerated.

Added a sentence: for reversible reactions, it is necessary to study the law of its change, mainly to look at the change of concentration, the change of concentration, the reaction speed or reaction equilibrium will change.

1. In the chemical reaction, add inert gas: when isobaric, the volume of the reaction system is greatly increased (the pressure is greatly reduced) and the reaction moves in the direction of the decrease in the amount of gaseous substances; 2. In the chemical reaction, the reaction gas is added, and when the isochoric is added, the concentration of reactants is greatly increased, and the equilibrium moves forward; In isobaric situations, the situation is more complicated and requires specific analysis of specific problems.

Look at the change in pressure volume before and after addition and the change in the system.

When the pressure before and after the addition of inert gas is the same, then the pressure of the reaction system becomes smaller. For reversible reactions, it moves in the direction of volume increase.

2) When the volume before and after the addition of inert gas is equal, then the v of the reaction system decreases and the pressure increases. For reversible reactions, it moves in the direction of volume reduction.

When the pressure before and after the addition of reaction gas is the same, (e.g., 2a+b=c is all gas, and a is added, then only increasing the conversion rate of b has no effect.) At the same time, the amount of 2a+b is added, then it does not matter)

2) When the volume of the reaction gas is equal before and after the addition of the reaction gas, it is equivalent to the increase of the pressure of the reaction system. For reversible reactions, it moves in the direction of volume reduction.

The addition of gases can all be attributed to the effect of concentration.

1.Volumetric setting. The addition of noble gas is to reduce the concentration by the same degree, and the chemical equation has light, moving in the direction of increasing gas molecules. When gas reactants are added, the concentration of reactants increases, and the equilibrium shifts to the right, while gas products are added in the opposite direction.

2. Inert gas is added under equal pressure, which has no effect on the concentration and the balance remains unchanged. The addition of gas reactants is equivalent to increasing the concentration of reactants while decreasing the concentration of other gas reactants and gas products, and the specific movement is related to the expression of k, which can be analyzed with a little mathematical knowledge.

PS: The equilibrium movement is only related to the forward and reverse reaction rate, and the reaction rate is only related to the properties and concentrations of reactant products, reaction temperature, and contact area.

Constant capacity conditions: (box).

The addition of inert gas has no effect because the addition of inert gas does not change the concentration of the reactive gas.

The addition of reaction gas is equivalent to increasing the concentration of reactants, and the reaction is moving forward under constant pressure: (needle).

The addition of inert gas is equivalent to pushing the piston up, that is, reducing the pressure, reducing the volume of the reaction gas, and moving in the direction of gas increase.

The reaction gas is added and does not move.

In the final analysis, it is the concentration that affects the reaction speed. Isobaric actually increases the reaction volume, so the concentration of each reactant decreases, mainly depending on who has the greatest impact on the concentration reduction, and reacts in whose direction. moving in the direction of a decrease in the amount of gaseous substances; At the same volume, the concentration of various substances in the equilibrium system remains unchanged, and the pressure of the reaction system increases.

+ Lazy and equivalent, no change. + Inverse isotropic and speed up to the smaller side. + Lazy isobaric to the larger side (slower). + Anti-isobaric, no change.

All about gases:

n2+3h2←→2nh3

2so2+o2←→2so3

2NO2 (brown) N2O4 (colorless).

h2(g)+i2(g)←→2hi(g)

Partially involved in gases:

h2o+cl2←→hcl+hclo

h2o+co2←→h2co3

h2o+so2←→h2so3

h2+s←→h2s

co+h2o←→co2+h2

nh3+h2o←→nh3·h2o

ionized in solution).

nh4+ +oh-

Do you know the essence of the reaction between hydrogen and oxygen?

Not a reversible reaction.

Reversible reaction refers to the reaction that can be carried out in both the direction of the positive reaction and the direction of the reverse reaction under the same conditions, which is called a reversible reaction. The reversible reaction cannot be carried out completely to the end.

The ignition reaction of hydrogen and water can only produce water, and hydrogen and oxygen can be produced without water. The reaction can be carried out completely to the end, i.e. 100% water is generated.