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What's happening there? Well, the selection of reactants has been done judiciously to provide either heat or to provide something that's cool.
就会感到这东西，比如说变冷了，对吧？,这里发生了什么？这些反应物都是,被仔细的选出来的，能够提供热量或制冷。
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maybe fill in the holes and you kind of figure out, "Oh, yeah, okay, that's what happened there."
也许可以试着填空，你会弄明白的，“哦，对了，好吧，原来是那样。”
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And typically, we'll be treating at least some cases where we're dealing with ideal gases in which case we can easily get delta u.
那么我们也可以定出功，对吧？,典型地，我们至少会处理,一些理想气体的情况。
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You'd pull out your pencil and paper, you can do it as a matrix inversion if you know how to do that, or you can just simply do substitution of one equation into another to solve it.
你知道你在小学的时候是怎么做的对吧？,你拿出你的笔和纸,如果你会的话,你可以解一个方程组,或者你可以单纯地。
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Unfortunately, the mediocre person who blunders, ? you now think is even more mediocre. Right?
不幸的是，本来就是平庸之辈，再出丑，你会觉得他更平庸，对吧？
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But you know, you kind of wonder if that's a good example for fire insurance because if the whole city burns down, then insurance companies would go bankrupt anyway, right?
但是你也许会疑惑,对于阐述火险来说,这是不是个好例子,因为如果整个城市被烧毁,那么保险公司就会破产,对吧
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But notice that in terms of the contents of the life, at least the local contents, ? it's a bit hard to see why that would be the case, right?
但是请注意在生活内容方面，至少是局部的生活内容，有点难理解为什么会这样，对吧？
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So, you would say, well, that's another place where Homer got it right, except for the fact that we also know how chariots are used in warfare and the closest analogy, I think, is to think of chariots as tanks.
你们可能会说,好吧,荷马又说对了,除非我们也懂得如何在战争中使用战车,我认为最相近的类比是把战车比作坦克
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These 2 are going to come together like this, and the first bond that we're going to form is going to be a sigma bond, right, so we see that here. If we're looking head on, we see they form a sigma bond.
它们两个会靠近到一起，首先会形成的是,一个sigma键，对吧，我们在这里可以看出来，我们看到它们形成一个sigma键。
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Right? That would be an entirely different matter, wouldn't it, because you would have absolutely no idea whether the question was rhetorical or grammatical, right?
对吧，那将会是一个完全不同的情况，难道不是吗，因为你就会完全不知道,这个问句是修辞型的还是语法型的，对吧？
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Somebody will go, "Shh." Right?
一定会有人对你比划,嘘,对吧
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But obviously, you choose somebody that is going to say your work is great. Right.
当然了，你肯定要选择那些会夸奖你工作成绩的人来给你写推荐信。对吧。
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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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If you played in the Divinity School, you might think that people in the Divinity School might care about other people's grades, right?
如果我们在神学院做这个游戏,你们都同意吧,神学院的学生,会在意别人的成绩,对吗
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You'd redistribute in a flash, wouldn't you?
你会马上进行再分配，对吧？
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There is a change in temperature, right?
温度会改变，对吧？
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Well, they would probably agree that we'd do some risk-sharing, right?
也许会达成共识,我们来分摊风险，对吧？
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Well,rip out the heart,it's going to kill me,right?
取出我的心脏我就会死，对吧？
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if your friend asked to borrow $100 from you, ... you would probably not say-- you might actually put interest on this person, so you could say, alright, I'll do it with 5% interest, pay me back in a year.
你的朋友向你借100美元，你可能不会说-,你可能会对他收取利息，因此你没准会说，好吧，我要收5%的利息，一年之后连本带利还我。
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But if you touch the valve going into your tire which basically measures the temperature of the air going into your tire, that is getting hot, right.
以至于浑身发热,如果你摸气筒的阀门,相当于近似测量了进入轮胎的气体的温度，它会很热，对吧。
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And then, I have this little image of some plant made out of gears, right?
然后,我们脑海里就会浮现,某种由齿轮构成的植物,对吧
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Oh. You can only hurt the one you love. Right?
你只会被所爱的人伤害，对吧？
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And what he would expect is if this Plum Pudding model is true, nothing's really going to happen to the particles, right, they should go straight through, because if they hit an electron, those are so small.
他所预期的是,如果李子布丁模型，是正确的，alpha粒子,不会发生什么事情,对吧，它们会直接穿过去,因为如果它们撞到电子。
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You can feel something cooling off right. I mean simple examples of these happen when you you know, if you buy cold or hot packs.
可以立即反应的东西,你可以感到有的东西会冷却，对吧？,我是说，举个简单的例子。
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But, it will be plus, all right? But, it will be plus.
但是，会是正，对吧？，但是这件会正。
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Amoebas split,right?
比如阿米巴原虫会分裂，对吧？
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We're just going to go through it and execute it a little bit. And then we'll move on and talk about how we'd actually make some of these measurements of delta H and compare
对吧？我们会讲完它并,实际应用一下，然后我们会,继续讲一下实际上我们,是怎样测量△H并与
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So how does delta H change if we change the temperature?
对吧？那么如果我们改变温度,ΔH会如何变化？
应用推荐