为什么化学平衡常数是 浓度的化学计量数幂 而不是 浓度的化学计量数倍数

2025-03-26 13:51:51
推荐回答(1个)
回答1:

其实你应该这么想 从相当论的角度来讲 当反应的数据无限接近于正无穷 那么它的反应物跟生成物的反应曲线也就大大的不同 在数字越大的地方越明显 用一个例子来说 比如可以认为 N2跟O2的完全反应为全部生成NO2 那么当02跟N2增大为100倍的话 他们分子浓度就增大了100倍 当然反应速度等等都应该变化的 那么有一种可能就是反应按照1单位物质容量的倍数 也即是你说的K 改变 这些都是有科学依据的 不是靠猜测 都是做实验得出的事实 对于你说的系数变化了 我想你应该这么考虑 系数为什么会变化 难道只是温度么 浓度 压力都可以变化的 因为你不是指纯物质的反应 你说的很对 计量系数 也就是反应方程式的系数变化了 你就可以认为该反应K有变化 外在条件可以改变反应的量比及各物质的存在方式等等 从而改变K

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