University Chemistry ›› 2018, Vol. 33 ›› Issue (12): 96-99.

• Between Teacher and Student •

### Discussion about the Definition of Reaction Molecularity

Wenjuan RUAN,Zhiang ZHU*()

• Received:2018-03-16 Published:2018-12-14
• Contact: Zhiang ZHU E-mail:zazhu@nankai.edu.cn
• Supported by:
天津市物理化学系列课程教学团队建设项目;南开大学教育教学改革项目

Abstract:

There are two different views on the definition of reaction molecularity in physical chemistry textbooks and related literatures so far. We give a deep discussion about this conception herein. Starting with the development of chemical kinetics and the definition of elementary reaction and state-state reaction, we clarify that elementary reaction and state-state reaction are the conceptions belonging to macro-and micro-systems, respectively, and reaction molecularity is also belonging to micro-conception. Based on this conclusion, we think that the more reasonable definition of reaction molecularity should be "the number of chemical particles that take part in a state-state reaction (or an elementary chemi-physical reaction) as a reactant".

MSC2000:

• G64