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To ask questions like how much heat is released in a chemical reaction that takes place at constant temperature.
当我们想要知道,当一个化学反应在恒定的温度下发生时,会放出多少热量时。
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And this is the reason why enthalpy was invented and why it's so important. Because we want to know this. So this for a finite change.
这也就是为什么焓要被提出,而且如此重要的原因,因为我们想要知道这些。
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What I thought I would do is first give you a little bit of sense of some of the opportunities that we as a group have been exploring.
我想我先要做的是给你们,一点感觉，知道我们这个团队,是研究什么的。
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And yeah, I know you know how to do it, but let's think about what might happen if I wanted to do that.
对，我知道你们知道该怎么做，那么让我们看看如果我,想要完成的话会发生什么。
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So we should be able to calculate a z effective for any atom that we want to talk about, as long as we know what that ionization energy is.
我们应该可以计算出任何一个,我们想要谈论的原子的有效电荷量，只要我们知道电离能是多少。
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What we're wondering about is ... is there a single... Oh here's a jargon.
我们想要知道的是,是一个。,这里有个术语。
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We're going to ask, "What's the needle showing at different times?"
我们想要知道,"不同情况下指针的读数是多少"
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Well, we certainly didn't know on day one how many times each of you was going to want to call get string, how many words a user might type when you call get string.
好的，当然我们不知道第一天你们,想要调用GetSting多少次，当你调用GetSting时，用户会输入多少单词。
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While I was there, many many of people said to me: look, we want you to succeed we believe you mind your doing, we know you have good intentions and we hate these people when they were in power, but we have to live here, t succeed, and many people have come here and not succeed before you.
当我在那边的时候，很多人对我说：,我们想要你成功，我们知道你很在意你所做的事，我们知道你是好意的，恨这些掌权的人，但是我们得在这里生活，如果你不能成功，在你之前也有很多人失败了，and，if，you，can’
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Different theories might have different explanations as to-- are these things valuable because we want them, ? or do we want them because we recognize they're valuable?
不同的理论可能会有不同的解释-,这些东西有价值是因为我们想得到它们，还是我们知道这些东西有价值所以才想要？
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We want to know what is the mass of the elephant.
我们想要知道大象的质量
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So, we can use Coulomb's force law to think and it does that, it tells us the force is a function of that distance. But what it does not tell us, which if we're trying to describe an atom we really want to know, is what happens to the distance as time passes?
来考虑这两个粒子之间的,它告诉我们力随距离的函数关系,但它不能告诉我们，而我们如果要描述,原子又非常想知道的是,距离随时间的变化时怎样的？
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We want to have that definition clear because in fact we're going to, we might want tabulate heats of reaction, right, and of course want to know what the conditions are for the tabulated values apply. And we're going to want to calculate them from other quantities and again, we're going to need to know each case what are the relevant conditions?
我们想要明确这个定义,因为实际上我们会想把,反应热制成表格，当然我们会,想知道表中的数据在什么样的,条件下是有效的，我们会,想要从其他的量中算出它们,再一次，我们需要知道,每种情形下相关的条件是什么？
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So if we consider lithium, potassium, and sodium, they're all together in the same group on the periodic table, knowing what we do about biology we can immediately think of sodium and potassium, or even just knowing what you know about table salt, for example, that these are two elements that we find, and particularly in the ion form in very high concentrations in our body.
我们来考虑一下锂，钾和钠，它们都在周期表中的同一族里，想要知道我们将元素周期律,用到生物学会怎么样，我们首先想到的就是钠和钾，甚至只需要知道食盐，我们发现它们是以很高浓度的离子形式,存在于我们体内的两种元素。
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