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Well, if we wanted to draw that, we have HF, whoops --It looks something like that.
如果我们想画他，哎呀，它看起来有点像那个某个东西。
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Now, if I get over here, HF, I know that fluorine is hogging the electron, so it is not equal sharing. It is over here.
那我们再看到这里，氟化氢，我知道氟在拉电子，所以它就不是平均共价。
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Hf What's my heat of formation? Delta Hf.
生成热是什么？△
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We only have the one bond so the actual HF molecule is polar, it has a net dipole.
但HF中只有一根键,所以分子也是极性的而甲烷中有一个网状偶极。
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HF And let's take an example, HF, hydrofluoric acid, all right?
这里有个例子，氢氟酸，对吧？
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For HF, just for grins and chuckles, let's do it.
只为了好玩算一下，一起来做。
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And you have the bond energy in HF.
你得到氟化氢的共价能。
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And so this is the H-F bond in HF.
所以这是氟化氢中的氢氟共价键。
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08 This is 4.19. You get the E of the HF is equal to 608.
这是4。19，HF的E是。
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Now, if we plug in the numbers, we plug in the numbers for HF.
如果加上这个数字，对于HF，我们加上这个数。
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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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And, so, what that tells us is HF is polar.
所以这个答案告诉我们HF是极性的。
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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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And we could do this for our compound here, HF.
我们能为HF做计算。
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Let's go through this calculation for HF.
我们把H，F数据代入检验这个公式。
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