But this is a compound, right, it has some non-zero heat of formation from the elements. So is water, right?

但这是种化合物，对吧？,它具有非零的生成热,水也是一样，对吧？

麻省理工公开课 - 热力学与动力学课程节选

So there are two other models, then, models different from the immigration model, two other models for understanding the formation of Israel, that build on this archaeological evidence.

那么还有两个其他的模型，与移民模型不同的两个模型，这两个模型也是为了说明以色列的形成，它们是依据考古学证据。

耶鲁公开课 - 旧约导论课程节选

And that is how come he got involved in this, obviously this is talking about crystal formation.

这也是为什么他会出现在这里，结晶学就是研究晶体的形成。

麻省理工公开课 - 固态化学导论课程节选

Delta H of formation means the enthalpy of this compound minus the enthalpy of its constituent elements in their most stable state at room temperature and pressure.

生成焓就是这种组分,的焓减去它的所有组成元素,在室温和常压下处于,其最稳定的状态时的焓。

麻省理工公开课 - 热力学与动力学课程节选

This is the negative heat of formation, right?

这里是负的生成热，对吧？

麻省理工公开课 - 热力学与动力学课程节选

And if I do that then I can find out the change in enthalpy of this reaction. It's just going to be the heat of formation of these three moles of water, minus the heat of formation of the iron oxide. OK.

我就能得到这个,反应的焓的变化,它就是三摩尔水,的生成热，减去氧化铁的,生成热，好。

麻省理工公开课 - 热力学与动力学课程节选

So this is simply the energetics of crystal formation.

这就是简单的晶体形成的静电原理。

麻省理工公开课 - 固态化学导论课程节选

So here, I'm going to have delta H, is just the sum for all the products of delta heat of formation right? Here I'm going to put together all the products. So this is a positive heat of formation.

所以这里△H就是所有生成物的,生成热的和,对吧？这里,我要把元素组合成所有这些,生成物，所以这里是正的生成热。

麻省理工公开课 - 热力学与动力学课程节选