键能又叫键强度(bond strength)或键焓,是键离解能(bond dissociation energy)的简称,它既是广泛用于化学各个领域的一个术语,又是化学教学中比较容易引起混淆的概念之一。许多教材和文章在介绍化学键能数据时,常常不注意这样一个事实:五十年代一般公认的键能值后来几乎都被修正了。因此出现矛盾,以致产生混乱,本文就有关键能的几个问题谈点看法。 Bond, also known as bond strength or bond enthalpy, is an abbreviation for bond dissociation energy, a term widely used in various fields of chemistry and the more confusing concept of chemistry teaching one. Many textbooks and articles often fail to take note of the fact that in the introduction of chemical bond energy data, the generally accepted bond-energy values ​​of the 1950s were almost all later amended. Therefore, there are contradictions, resulting in confusion, this article has a few key issues on the key point of view.