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So, there's actually another way to graph it where we can directly graph the dissociation energy or the bond strengths.
其实，还有另外一种画这个曲线的方式,可以直接画出离解能的大小,或者键的强度。
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So what we can actually directly compare is the dissociation energy or the bond strength of nitrogen versus hydrogen.
因此实际上我们可以直接进行比较,对氮分子与氢分子的离解能,或键的强度。
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Because, when you ask yourself that question, you should consider what is the thermal energy versus the bonding energy?
这是因为，对于这个问题，我们应当考虑到,什么样的热能,对应于键能？
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That doesn't heal naturally but can be reformed by other enzymes called ligases, ligases re-established the phosphate bonds.
这不能恢复如初,但用连接酶可以做到这一点,连接酶能重建磷酸键
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What you can do is you can iterate keys, which gives you the keys in the dictionary, and then you can choose them, but there's no guarantee in the order in which you get keys.
你能做的就是迭代得到键，这样就可以得到字典中，所有的键并进行选择，但是键的顺序,是没有保证的。
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So in a moment you're going to go ahead and hit the spacebar and then as things fall from the screen when they line up with the left arrow, hit the left arrow with a different arrow, hit that arrow and see how good a score you can get.
一会儿你走到前面，敲一下空格键,当屏幕上面的东西从左边往下掉的时候,你就敲一下键盘上的左键,是哪个方向，敲对应的方向键就可以了,我们来看看你能得多少分。
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So the point is, this balance between energy thatyou could think of as say bond energies in chemical reactions, and entropy that you can think of in terms of disorder, how many different possible combinations or configurations of something wrong, will dictate where the equilibrium lies.
关键在于，这种能量与熵之间的平衡,确定了平衡的条件，在化学中能量涉及键能，而熵和无序有关,即有多少可能的不同组合或者形位，二者的平衡会告诉我们平衡态是什么样子。
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There are nine keys for my left thumb alone so I'm kind of switching between these on the back here and many others, and because of that I can go very high and I'll just demonstrate that.
我的左手拇指就要控制九个音键,通过按动后部,和其他地方的音键,我就能吹出很高的音,我现在就来演示
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so you can see that there is going to be two sets in antibonding, three sets in bonding for a net of one, giving us the single bond.
因此你能看到,反键轨道上有两组，三组成键，得到一组净成键，所以成的是单键。
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It's much more relevant to set our zero point energy as the separation of a bond in terms of talking about the reactions that we'll usually be dealing with here.
更好的是把零点能定在,键断裂的时刻,在讨论化学反应的时候,而我们以后将经常遇到化学反应。
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It allows for plurality of bonds from any ion.
对于任何离子，能形成很多键。
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All right, so we can now see a little bit of what the power of molecular orbital theory is in predicting what kind of bonds we're going to see in molecules, or whether or not we'll see this bonding occur at all.
好了，我们已经可以看到一点,分子轨道理论在预测分子中,所成的键或者分子，能不能成键方面的能力了。
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If we know that this is it the dissociation energy for a hydrogen atom, we can also say the bond strength for hydrogen molecule 424 is 424.
如果我们知道了这是一个氢分子的离解能,那么我们也可以说氢分子的键的强度,就是。
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This energy level diagram helps us understand the relationship between electron filling and bond strength.
能级图能帮助我们,理解电子填充,和键强的关系。
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I've got two states here, three states here, two here, I need four, and if I can come up with these bonds, four, by the Hund rule I'd fill them like this.
我们已经有2个状态在这里，3个在这里，2个在这里，我需要4个，如果我能想到这些键，四个，通过洪特规则，我们就能像这样排布。
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And it turns out that when you constructively have two p orbitals interfere, and when I say constructively, I mean they're both either positive or they're both the negative lobes, that's when you got bonding.
当两个ｐ轨道,相长干涉时，我说的相干相长，意思就是说它们要么都是,正的叶瓣要么都是负的叶瓣，这时就能成键。
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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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Just to give you a sense of what that means, if the 264 figure is pure covalency and the 344 is partial ionic character, what fraction of the 608 is 344? 344, which is partial ionic character, 57% divided by 608 times 100 is 57%.
它只是给你一个这样的概念，264千焦每摩是完全共价成分的键能,而344是离子成分的，344除以608是多少，344，是不完全的离子特性，除以608乘以100得到。
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Gentleman can you...?I'm goint to hit... But I was told to do funishion Fa Hua.All right.It's something came up and then disappear.
各位男士,你们谁能教我,我该按哪,有人告诉我是按Fa键,好吧,幻灯片出现,然后消失
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If the bonding energy is very strongly negative, thermal energy isn't great enough to disrupt those bonds and allow those bonds to be broken and then have fluidity.
如果键能非常强，热能并不足以,打破这些化学键,破坏这些化学键,并使它们液化。
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But he said the energy of an X-Y bond is going to be equal to the square root.
但他说ＸＹ键的键能,会等于ＸＸ键与ＹＹ键键能乘积的平方根。
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So, another way to talk about dissociation energy is simply to call it bond strength, it's the same thing, they're equal to each other.
讨论离解能的另外一种方式,是直接称它为键的强度，它们是一样的，彼此相等。
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And, if they don't share equally, then the individual bonds might have different energies.
如果他们不是等价的共用，个别的键,可能有不同的键能。
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CH4 is sp3 carbon hybridization.
能容纳4个原子成键。
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Any time two orbitals come straight on together in that internuclear axis, you're going to have a sigma bond.
任何时候两个轨道,在核间轴上直接到一起，你就能得到sigma键。
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So, let's change our graph where we now have this zero point set as the two individuals hydrogen atoms, and then we see that our h 2 molecule is at the negative of the dissociation energy, or the negative what that bond strength is.
那么让我们把曲线图中的零点能改到,两个分离的氢原子处，那我们就会看到,氢分子就是负的离解能，或者负的键的强度。
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So, this gives you the energy of the bond.
这可以算出键能。
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More particularly, the HH bond, right, and let's ask what the energy of that is.
特别的是，HH键，让我们看看他的键能是多少。
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All right, so the type of bond energies that we can go and look up in tables are individual atom bonds, H-H, F-F, and the like.
好的，键能的类型,我们能够在表中查到,都是独立的原子键，H-H，F-F以及类似的。
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Well, you go look in your table So, if I had to guess, 4 what would you guess the bond energy would be in HF?
在你的表格里也有,如果让我们来猜猜，你会猜HF的键能是多少呢？
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