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Now the first law is going to hold in all of these steps, and we're going around in a cycle.
现在热力学第一定律,就蕴含在这所有的步骤里了，我们沿着这个循环走。
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So he grabbed his thermometer, and went and made a couple of measurements and discovered the first law of thermodynamics.
所以他拿来了温度计，进行测量,后来就发现了热力学第一定律。
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So in some sense, the first law would suggest you can sort of break even.
初看起来，热力学第一定律,可以保证这个过程是可行的。
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This is an abstract and powerful mathematical statement of the first law of thermodynamics.
这是热力学第一定律的一个抽象,而且具有很强数学性的表述。
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du=dq+dw So our first law, du is dq plus dw.
热力学第一定律。
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So, over the last few lectures we've worked and struggled so formulate the second and third laws of thermodynamics in addition to the first.
在前几次课中,我们通过努力明确的,给出了热力学,第一，第二和第三定律。
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We're ready for the first law. We're just going to go to through these laws pretty quickly here.
现在我们来讨论热力学第一定律,我们只会做简要的讨论。
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Fairly powerful statement, and that's another form of the first law of thermodynamics.
这是一个相当有用的表述,是热力学第一定律的另外一种形式。
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That is, it gives us the relationship between energy and work and heat.
热力学第一定律阐述了,能量，功和热之间的关系。
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PROFESSOR BAWENDI: Last time you talked about the first law of thermodynamics.
教授：上一次我们谈到,热力学第一定律。
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So what we're going to do is consider the first and second laws.
我们需要考虑的是,热力学第一和第二定律。
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And the first law says, well heat and work are different forms of energy, and we can add them, and the path dependence of these two things is somehow cancelled in the fact that we have this internal energy.
热力学第一定律说，热和功是能量的不同表现形式，我们可以把它们加起来,它们与路径相关的部分相互抵消,我们就有了内能。
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That's the first law of thermodynamics.
这是热力学第一定律。
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We'll then look at the quantity, internal energy, which we define through the first law, and we think of it as a function of two variables T and V.
接下来我们考虑内能，这是由热力学第一定律定义的物理量，我们把它看作T和V的函数。
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All right, now what we're going to learn next time and Bob Field is going to teach the lecture next time, is how heat and work are related, and how they're really the same thing, and how they're related through the first law, through energy conservation.
这节课就到这里,下节课将由Bob，Field讲授,我们将学习功与热量的关系，认识到它们在本质上的相同之处，并通过热力学第一定律，亦即能量守恒定律，把它们联系起来。
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