Difference Between Dynamic Equilibrium and Equilibrium

动态平衡vs Equilibrium

当一个或多个反应物转换为产品时，它们可能会经历不同的修改和能量变化。反应物中的化学键断裂和新键形成，以生成与反应物完全不同的产物。这种化学修饰称为化学反应。有许多控制反应的变量。主要是，通过研究热力学和动力学，我们可以就反应以及如何控制它们得出很多结论。热力学是对能量转化的研究。它与反应中平衡的能量和位置有关。

Equilibrium

Some reactions are reversible, and some reactions are irreversible. In a reaction, reactants are converting to products. And in some reactions, the reactants can be generated again from the products. This type of reactions is called reversible. In irreversible reactions, once the reactants are converted to products, they cannot be regenerate again from the products. In a reversible reaction when reactants are going to products it is called the forward reaction and when products are going to reactants, it is called the backward reaction. When the rate of forward and backward reactions is equal, then the reaction is said to be at equilibrium. So over a period of time the amount of reactants and products are not changing. Reversible reactions always tend to come to equilibrium and maintain that equilibrium. When the system is at equilibrium, the amount of products and the reactants have not to be necessarily equal. There can be a higher amount of reactants than the products or vice versa. The only requirement in an equilibrium equation is to maintain a constant amount from both over time. An equilibrium constant can be defined for a reaction in equilibrium; the equilibrium constant is equal to the ratio between concentration of products and concentration of reactions.

k = [产品]ⁿ/ [reactant]^mnand m are the stoichiometric coefficients of the product and reactant.

For an equilibrium reaction, if the forward reaction is exothermic then the backward reaction is endothermic and vice versa. Normally, all the other parameters for forward and backward reactions are opposite to each other like this. Therefore, if we want to facilitate either one of the reactions, we simply have to adjust the parameters to facilitate that reaction.

动态平衡

Dynamic equilibrium is also a type of equilibrium where the amounts of products and reactants do not change over time. However, in dynamic equilibrium, saying that the amounts do not change, does not mean that the reaction has stopped. Rather, reaction is proceeding in a way that it keeps the amounts unchanged (the net change is zero). Simply the word “dynamic equilibrium” means that the reaction is reversible and still continuing. For a dynamic equilibrium to take place, the system should be a closed one, so that no energy or matter is escaped from the system.

What is the difference between Equilibrium and Dynamic Equilibrium? •动态平衡是一种平衡。 • In a dynamic equilibrium, while the amount of reactants and products remain unchanged, the reaction continues, because the rates of the forward and backward reactions are the same. There can be some instances in equilibrium where the amounts of products and reactant remain unchanged because the reaction has stopped.