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Now, you know with constant volume, H now it's not going to be delta H that's U straightforward to measure, it's going to be dealt u, all right.
好，现在你们知道在体积恒定的条件下，我们得到的不是Δ,我们直接测量到的是Δ,好，但这基本上也是一样的。
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Do you know any policies that the U.S. government is using to fight global warming?
你知道一些美国政府应对全球变暖的政策吗？
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Do we calculate, you know, delta S, delta u, delta H?
是否要计算熵的变化，内能的变化，自由焓的变化？
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Do you know we have, in the U.S., a corporate profits tax?
你们知道在美国有,企业所得税吗
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I don't know if any of you watched tennis recently, but the U.S. Open has been shown and there's an Oreo advertisement with the William sisters and so you--that's why people know about these foods.
不知道你们最近看没看网球赛,美国网球公开赛上有一则奥利奥广告,是由威廉姆斯姐妹做代言的,人们以这种方式听说这类食品
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It makes sense, right, because you know we got less work out and delta u is the same right, so it must be that less heat got transferred.
这是显而易见的，因为输出的功更少,且Δu相等，所以需要的热量更少。
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pV So our H is u plus pV, as you know.
我们的自由焓H等于内能u加上。
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So I'm going to write that immediately here, u=0 because I know the answer to that path here.
等温过程，我们可以得到，Δ
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Well, it's not just in the U.S., essentially every--I don't know if there's any exception.
当然不仅仅是在美国,实质上是每个...我不清楚是否有特例
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I don't know what percent; our oil reserves in the U.S. are pretty small, so we're kind of lying somewhere inside-- maybe on this pink line.
我不知道具体占百分之几;,美国的石油储备量是微不足道的，所以我们可能是位于这附近-,也许在这条粉线上面。
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The U.K. Had copied the U.S. Idea -I guess they copied -I don't know where the original -I think it's probably -is it U.K. Cpying the U.S. In this case?
英国效仿了美国的想法,我猜他们是效仿美国的,我也不知道谁先发明的,我认为可能是,存款保险是英国模仿美国
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So delta u is just equal to the work but we also know what happens T2 because the temperature is changing from T1 to T2.
所以Δu等于输出的功,但我们也知道它会发生,同时我们知道温度从T1变到。
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T2 So we know that delta u is just Cv times T1 minus T2.
u等于Cv乘以T1减去。
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U And then if we can also determine delta u, then we know this, we know delta u is q plus w w, then we can determine work as well, right?
然后，如果我们也能定出△,然后我们知道这个,我们知道△U等于q加？
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For the ideal gas, we know that u is volume independent.
对于理想气体,我们知道u与体积无关。
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