What Is a Reversible Reaction?

The reaction to tritium is also called a reversible reaction. Under the same conditions, a reaction that can proceed in the direction of both the positive reaction and the reverse reaction is called a reversible reaction . Most reactions are reversible. Some reactions are not reversible under normal conditions, and changing conditions (such as placing the reactants in a closed environment, high temperature reactions, etc.) will become reversible reactions.

The reaction to tritium is also called a reversible reaction. Under the same conditions, a reaction that can proceed in the direction of both the positive reaction and the reverse reaction is called a reversible reaction . Most reactions are reversible, some reactions are

1. The reaction cannot proceed to the end. Regardless of how long the reversible reaction proceeds,

(1) Rate V _positive = V _inverse (v is not 0)

(2) The percentage content of each substance remains unchanged

The concentration of each substance does not change with time

The amount of each substance does not change with time

(3) If there is a gas reaction, the total of the mixed gas

(1) The root cause of balance movement is V _positive V _inverse

V _positive > V _reverse : balance moves in the direction of positive reaction

V _positive <V _inverse : balance moves to negative reaction direction

(2) The direction of balance movement can be determined

Content: For a reversible reaction, under certain conditions, whether the reaction starts from a positive reaction or a reverse reaction, the same equilibrium state can be established, that is, different initial conditions can reach the same equilibrium state. There are two cases of equilibrium here:

(1) When the temperature and volume are constant, the amount of each substance in the equilibrium is the same. At this time, the different initial states are actually equivalent to one initial state.

The method of judgment is to completely attribute the products to the reactants or products according to the equation. If the quantities are the same, they are in the same equilibrium state. If the quantities are different, they are not in the same equilibrium state.

(2) When the temperature and pressure are constant (that is, the volume is variable), the concentration or percentage content of each substance is the same at equilibrium. At this time, in different initial states, after the product is zeroed, as long as the ratio of the amounts of the reactants is the same, the same equilibrium state will be reached.

(3) For reactions with equal gas volumes before and after the reaction. In addition to meeting the above conditions, the percentage content of each substance can be the same, but the concentration is different under constant temperature and constant volume conditions. At this time, the initial state is different. After the product is returned to zero, as long as the ratio of the amount of the reactants is the same, the same equilibrium state will be reached.

E.g:

H ₂ (g) + I ₂ (g) 2HI (g) [Reaction conditions: constant heating]

Cl ₂ + H ₂ OHCl + HClO

N ₂ + 3H ₂ 2NH ₃ [Reaction conditions: high temperature and pressure, catalyst]

2SO ₂ + O ₂ 2SO ₃ [Reaction conditions: catalyst, heating]

CH ₃ COOHCH ₃ COO [anionic group with a negative charge] + H [cation] ^[1]