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在一定条件下,若某一可逆反应经过若干种途径达到平衡时,反应体系中任何相同组分的百分含量(体积、物质的量)均相同,则这样的化学平衡互称为等效平衡.现将等效平衡的基本模型归纳分析如下. —、恒温恒容下的等效平衡1.在恒温恒容条件下,对于反应前后气体分子数不相等的可逆反应, 若只改变起始加入量,且通过化学计量数换算所得与原平衡相同,则称两平衡互为等效平衡. 例1在一固定体积的密闭容器中加入2 mol A和1 mol B发生反应2A(g)+B(g)(?)3C(g)+D(g).达到平衡时,C的浓度为W mol·L-1,若维持容器的体积和温度不变,按下列四种配比作为起始物质,达平衡后,C的浓度仍为W mol·L-1的是( ).
Under certain conditions, if a certain reversible reaction reaches equilibrium through several ways, the percentage content (volume, amount of substance) of any same component in the reaction system is the same, and such chemical equilibrium is mutually equivalent equilibrium. The basic model of equivalent equilibrium is summarized and analyzed as follows: 1. Equilibrium equilibrium under constant temperature and constant temperature 1. Under constant temperature and constant temperature conditions, if the number of gas molecules before and after the reaction is not equal, the reversible reaction will only change the initial addition. The amount is equal to the original balance by the conversion of the stoichiometric number, then the two balances are said to be equivalent to each other. Example 1 Reaction 2A(g)+B with addition of 2 mol A and 1 mol B in a fixed volume of closed vessel (g)(?)3C(g)+D(g). When equilibrium is reached, the concentration of C is W mol·L-1. If the volume and temperature of the container are maintained, use the following four ratios as the starting point. After the material reaches equilibrium, the concentration of C is still W mol·L-1 ().