平衡比较题可分为两大类,第一建立平衡的起始量是相同的或按化学方程式计量数转化为相同的物质其对应量相等,但外界条件不同的平衡间的比较.两个不同的平衡直接建立平衡移动.第二类是起始各量不同或按化学方程式计量数转化后其物质的量不同.方法是建立一个等效平衡作为中间状态,使一个平衡移动转化为两个平衡移动,使两个条件的平衡移动转变成一个条件的平衡移动. Balance comparison questions can be divided into two categories, the first establishment of the balance of the initial amount is the same or according to the number of chemical equation into the same material, the corresponding amount of equal, but the external conditions of different balance between the two different Of the balance directly established the second type is the starting amount of different or according to the number of chemical formula conversion after the amount of its material is different method is to establish an equivalent equilibrium as the intermediate state of a balanced movement into two balance Move, shift the balance of two conditions into a condition of balance movement.