Difference Between Equilibrium Constant and Equilibrium Position

Key Difference – Equilibrium持续的vs平衡位置

Equilibrium常数是在反应混合物平衡下的产物量和反应物之间的关系的数量，而平衡位置是平衡反应等于向后反应的时刻。This is the key difference between equilibrium constant and equilibrium position.

平衡是同时存在前向反应的系统的状态。这意味着，存在相互平衡的反应。平衡常数可以定量解释系统的平衡状态，而平衡位置则在质量上解释了平衡系统。

内容

1.Overview and Key Difference
2.什么是平衡常数
3.什么是平衡位置
4.Side by Side Comparison – Equilibrium Constant vs Equilibrium Position in Tabular Form
5。概括

什么是平衡常数?

The equilibrium constant is the number that gives the relationship between amounts of products and reactant of a reaction mixture at its equilibrium. An equilibrium state of a reaction mixture is the state approached by the system at which no further changes of the reactants or products takes place. The equilibrium constant is the ratio between concentrations of products and the reactants.

The equilibrium constant is independent of the initial concentrations of reactants. The factors that affect the value of the equilibrium constant are temperature, nature of the solvent, the ionic strength of ions in the reaction mixture, etc. The equilibrium constant is denoted by “K”.

Equilibrium Constant Equation

A + B ↔ C

对于上述反应，可以给出以下平衡常数。

k = [c]/ [a] [b]

This is also known as the equilibrium constant of concentrations because the concentrations of reactants and products are used in writing the expression. It is denoted by Kc. If the value of the K is higher than 1, the equilibrium favors the products. But if the value of K is lower than 1, the equilibrium favors reactants. When writing the expression of the equilibrium constant, should consider the stoichiometric values of the equation.

AA + BB↔CC

上述方程式的k如下。

k = [c]^c/ [一个]^a[b]^b

For the reactions between gaseous compounds, the equilibrium constant is given as the equilibrium constant of pressure. It is denoted by Kp. There, the pressure of gases is considered, and the units of the equilibrium constant are given by the units of pressure.

什么是平衡位置？

平衡位置是平衡的正反应等于向后反应的力矩。There is no observable change in the system at the equilibrium position. No net amount reactants are a loss, or no products are formed. If products are formed, they are converted back into reactants and vice versa.

What is the Difference Between Equilibrium Constant and Equilibrium Position?

平衡常数与平衡位置
Equilibrium constant is the number that gives the relationship between amounts of products and reactant of a reaction mixture at its equilibrium.	平衡位置是平衡的正反应等于向后反应的力矩。
Nature
The equilibrium constant is a number which gives the state of equilibrium.	The equilibrium position is a concept used to explain the state of an equilibrium system.
外部因素的影响
The value of equilibrium constant is changed when some parameters such as temperature, ionic strength are changed.	The equilibrium position does not change due to any change of the system.

概括– Equilibrium持续的vs平衡位置

The equilibrium constant is a quantitative explanation of the equilibrium state of a system whereas equilibrium position is the qualitative explanation of an equilibrium system. The difference between equilibrium constant and equilibrium position is that equilibrium constant is the number that gives the relationship between amounts of products and reactant of a reaction mixture at its equilibrium whereas equilibrium position is the moment at which the forward reaction of the equilibrium is equal to the backward reaction.

Reference:

1.Libretexts. “The Equilibrium Constant.” Chemistry LibreTexts, Libretexts, 23 Mar. 2018.Available here
2.“平衡常数。”Merriam-Webster，Merriam-Webster。Available here

Image Courtesy:

1.’平衡'Commons Wikimedia