What is the formula of active equilibrium?

Active balance can be solved by a formula: equal volume and equal pressure ratio; The reaction amount is unchanged, and both can be taken.

At (1) isothermal constant volume, the condition of establishing active equilibrium is that the reactants are fed equally. For example, when 1 mol N2, 3 mol H2 and 2 mol NH3 are put into two identical containers with constant temperature and volume, the mass fraction (or volume fraction) of NH3 in the two containers is equal at equilibrium.

(2) Under isothermal and isobaric conditions, the conditions for establishing active equilibrium are: the reactant feed ratio is equal. For example, under the condition of constant temperature and pressure, put 2.5 mol N2, 5 mol H2 and 5 mol N2 and 10 mol H2 into two containers respectively, and the mass fraction (or volume fraction) of NH3 in the two containers is equal at equilibrium.

(3) For the reversible reaction with constant gas volume before and after the reaction, whether it is isothermal isovolumic or isothermal isobaric, as long as the reactants and products are added in the same proportion, the equilibrium is equivalent to the original equilibrium.

relevant information

Under the same conditions, the same reversible reaction system can establish the same equilibrium state, that is, the active equilibrium, whether it starts from a positive reaction or a reverse reaction, or it can start from an intermediate state (reactants and products), and the concentration of each substance is equal at equilibrium. Because the state of chemical equilibrium is related to conditions, it has nothing to do with the way of establishing equilibrium.

The same reversible reaction, starting from different States, can form an active equilibrium as long as the content of substances is the same when reaching equilibrium. As long as the initial amount of each substance is equal, the same balance can be established. In other words, the relationship between the two equilibria is equal. All the equilibriums corresponding to the two equilibriums are completely equal.