利用数轴法求解热力学问题

Solving Thermodynamic Problems by Number Axis Method

利用数轴法求解化学热力学中化学反应的吉布斯自由能变、焓变、熵变的问题,把ΔH、T1ΔS、T2ΔS的数值或相对位置直接标在数轴上,根据相对大小判断它们的正负号和反应的自发性。该方法既直观,又方便、快捷,更容易被学生理解和掌握运用。

This article proposed a new approach to solve the changes of Gibbs free energy, enthalpy and entropy in chemical reaction based on number axis. The signs of △H, T1△S, T2△S （positive or negative） could be judged by marking their values or relative positions on number ax- is directly, so that the spontaneity of reaction could also be confirmed. This method is easier to be understood and grasped by the students because it is much intuitional, convenient and effi- cient,