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在中学化学中,化学平衡问题多局限于“定性”的阐述和“半定量”的分析。面对常见的化学平衡问题谈谈三种思维方法和技巧,和同学们共同学习,加深理解,从而提高做题的准确度和速度。一、极端思维[例1]:可逆反应N_2(g)+3H_2g(?)2HN_3(g),500℃时,在容积为5L的密闭容器中进行,开始时加入1molN_2和1molH_2,则达到平衡时,HN_3的浓度不可能达到的值是()
In middle school chemistry, the problem of chemical equilibrium is mostly limited to the explanation of “qualitative” and the analysis of “semi-quantitative”. In the face of the common problems of chemical equilibrium, we will discuss three ways of thinking and skills, learn together with our students and deepen our understanding so as to improve the accuracy and speed of doing the work. First, the extreme thinking [Example 1]: reversible reaction N_2 (g) + 3H_2g (?) 2HN_3 (g), 500 ℃, the volume of 5L in a closed vessel, the initial addition of 1molN_2 and 1molH_2, then reach equilibrium , HN_3 concentration can not achieve the value of ()