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So, if I look at the mole ratios on the reaction over there I'm going to find that I'll be able to consume, at most, 1,029 over two, right?
所以，注意反应的摩尔比,我们会发现，1029摩尔的镁能被消耗，对吧？
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This will be the definition of the mole as the amount of carbon weighing exactly 12 grams, so I would like to know now how many particles, how many carbons are there in that mole.
摩尔的定义就是,12克的碳的数量，我想知道有多少粒子，一摩尔会有多少碳粒子。
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So, for example, for the chlorine case, we would say that the electron affinity for chlorine is actually positive 349 kilojoules per mole.
比如，以氯为例，我们可以说氯的电子亲和能,应该等于正的，349，千焦每摩尔。
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The volumes per mole of that stuff.
每摩尔物质的体积。
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What is the mole? Mole is a more practical value, something that we can handle tangibly.
什么是摩尔，它有实际值，我们可以很明白的掌握的。
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The mole is something that was also defined in terms of carbon.
我们也以碳来,定义摩尔。
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If you divide the two of them through you will get 6.02 times 10 to the plus 23 per mole.
如果你除以他们两个,你会得到6。02*10^摩尔。
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So, what we get for the disassociation energy for a hydrogen atom is 424 kilojoules per mole.
因此，我们就得到了氢原子,离解能的大小为，424，千焦每摩尔。
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60 If we look at 435 times 160, take the square root of that, we will end up with 264 kilojoules per mole, which sensibly lies between these two values.
35乘以，取平方根，我们会得到264千焦每摩，很合理地落在两数值之间。
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So if I tell you that the energy for single hydrogen atom is negative 13 12 kilojoules per mole.
如果我告诉大家单个氢原子的能量,是负的，1312，千焦每摩尔。
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So this is not going to be a favorable process, we're going to find that the electron affinity is actually a negative 7 kilojoules per mole for nitrogen.
因此这并不是一个容易发生的过程，我们会发现氮的电子亲和能,应该是负的，7，千焦每摩尔。
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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 is 7 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。
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I'm averaging it over the entire set of valence electrons which gives me 1.91 MJ per mole.
我是在整个价电子的集合上作平均,最后得到1。91兆焦每摩尔。
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This means in order to do that we actually have to put 7 kilojoules per mole of energy into the reaction to make it happen.
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。
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But when the concentration in the alloy is 50/50 by mole, something magical happens.
但是当合金中的浓度,是1比1的时候，有些神奇的事发生了。
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And how do we get the value of the mole?
我们是如何得到摩尔的量值？
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And, just to show some of the hidden balance here, 1 here we have one mole. I don't put a one in front.
这儿有一些隐藏的平衡，比如说这个1摩尔，我并没有在前面写了一个。
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And the prefactor is 96.3 3 when you want to get a result in kilojoules per mole.
当使用千焦每摩表示键能3,时前因子为96。
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Yeah, they're different but they are roughly on the order of about 1 MJ per mole.
是的，它们是不同的但它们大致上,都是一摩尔一兆焦耳。
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Right? In other words I've got the stoichiometric coefficients in there and the values, and I'm subtracting the reactants from products -1652kJ/mol wind up with minus 1652 kilojoules per mole.
对吧？换句话说这里我用了化学,计量系数和生成热的值，从生成物中减去反应物,最后得到。
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This is the number of carbons there is in a mole of carbon.
这是碳的数量,这是一摩尔的碳。
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So I can make a quantity that I'll call V bar, which is the molar volume, the volume of one mole of a component in my system, and that becomes an intensive quantity.
所以我可以定义，一个叫做一横的量，这是摩尔体积系统中,一摩尔某种组分的体积，它就变成了。
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So, let's compare this to the energy of the h 2 molecule, and we find that that's negative 3,048 kilojoules per mole.
那么，让我们将它与氢分子的能量比一比，我们发现氢分子的能量是负的，3048，千焦每摩尔。
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And the change in energy for this reaction is negative 349 kilojoules per mole.
然后得到这个过程的能量变化为,负的，349，千焦每摩尔。
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And, one other thing that I failed to point out, if you take a look at the energies associated with the outermost electrons, in this case, lithium, you see it's 0.5 megajoules per mole, and then what's the 6.26?
还有另外一点我忘记提到的是，如果你观察离最外层,的电子的能量，在这种情况，对于锂，你可以得到，它是每摩尔0。5兆焦，那么6。26是什么呢？
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And, 435KJ/mol we can come up with a number of 435 kilojoules per mole HF Well, if we want to get HF, let's see what the FF bond is.
并且，我们想到一个数,如果我们想得到，我们看看FF键是什么。
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