从熵的角度解读凝固点降低公式

Interpreting Freezing Point Depression from the Viewpoint of Entropy

利用?G=?H-T?S推导了稀溶液凝固点降低公式,根据形成溶液前后相变熵的改变,对公式的含义进行了解读,即凝固点的降低完全归结于溶解过程相比于熔化过程的熵变增加。并对公式的拓展应用进行了简要分析。

The equation for depression of the freezing point for dilute solution is derived on the basis of △G = △H - T△S. The change of entropy in the solution before and after phase transition reveals that the depression of the freezing point is originated from the larger entropy change in the process of dissolution than that in fusion, The further application of this equation is discussed in a more general manner.