一、课程内容编排由浅入深,循序渐进难度要求有明显的梯度差异,比如热力学AS部分主要介绍焓的定义、各种焓变概念、盖斯定律和反应焓变的计算。A2则包括熵的定义,反应熵变计算,吉布斯自由能,化学反应自发性的判断,温度对自发性的影响等,难度明显提高。二、有机化学内容丰富,难度很高A Level化学课程中有四分之一的内 First, the content of the course from the shallower to the deepest, gradual difficulty requires significant gradient differences, such as thermodynamic AS part mainly introduces the definition of enthalpy, the concept of various enthalpy changes, Gass’s law and the calculation of enthalpy change. A2 includes the definition of entropy, reaction entropy change calculation, Gibbs free energy, the spontaneous determination of chemical reaction, the influence of temperature on spontaneity, and the difficulty is obviously improved. Second, the organic chemistry is rich in content, very difficult A Level Chemistry courses within a quarter