千焦

如果我们测量热力学量会发现自由焓的变化，等于4千焦，正4千焦。，delta，H，is，4，kiloJoules，，plus，4，kiloJoules。，熵增dS是45焦耳每开尔文。

If we measure the thermodynamics , we discover that dH Delta S is45 joules per Kelvin .

它的离解能只有0。01千焦每摩尔。

It only has a dissociation energy of . 1 kilojoules per mole .

本质上我们不会看到它，它等于9千焦每摩尔。

Essentially we 're not going to see this , it's9 kilojoules per mole .

这意味为了完成上面的反应，我们不得不往里面注入，7，千焦每摩尔的能量。

This means in order to do that we actually have to put7 kilojoules per mole of energy into the reaction to make it happen .

相反，氢分子在我们周围到处都是，一个氢分子的离解能，是432千焦每摩尔。

In contrast , the dissociation energy of a bond for hydrogen , and molecular hydrogen is everywhere around us , we see432 kilojoules per mole .

如果你有一个每摩尔400千焦的分子，和一个没摩尔200千焦的分子，我把它们并子一起，我怎么得到每摩尔500千焦的键？

If I have one that's400 kilojoules per mole and another that's200 kilojoules per mole and I blend them , how do I get500 kilojoules per mole ?

如果我们以氮为例，如果我们给氮增加个电子令它变成-1价的氮，我们会发现能量的变化是，7，千焦每摩尔。

So , if we took the case of nitrogen , if we add an electron to nitrogen and go to n minus , we find that the change in energy is7 kilojoules per mole .