化学平衡移动方向判断方法的研究

Study on the Judging Method of Chemical Equilibrium Shift Direction

针对恒温恒压条件下判断化学平衡移动方向这一化学平衡中的难点,运用理论分析方法推导出了恒温恒压下化学平衡移动的普适判据,并通过实例加以佐证。研究结果表明,在恒温恒压下的气相反应平衡中,改变某一反应组分的含量后,平衡移动的方向主要取决于下列几个方面的因素:①该组分的起始平衡浓度的大小,②所加组分的物质的量的多少,③反应的类型,④摩尔体积。

It is deduced theoretically that the critical method is sueeessfully used to judge the chemical equilibrium shifting direction in view of the teaching difficult point of judging chemical equilibrium shift direction under constant temperature and pressure, and its reliability is evidenced by means of living examples. The results show that when some reactant content is changed, the shifting direction of chemical equilibrium in the gaseous phase under constant temperature and pressure depends on the following factors： the initial equilibrium concentration of the designated constituent, the amount of substance of addition constituent, the type of reacton find the molar volume.