Now, we saw before, or really I should say we accepted before, that for an ideal gas, u was a function of temperature only.
我们已经看到,或者说我们已经接受这样一个事实,即理想气体的内能只和温度有关。
It turns out the U.S. and Jamaica are the only two places on Earth now that use the Fahrenheit scale.
事实上现在地球上,只有美国和牙买加这两个国家,还在使用华氏温标。
You wonder why would it be that the whole western half of the U.S. gets only or the western third of the U.S.
你也许会质疑,为什么,美国整个的西部一半只有一个,或者说美国西部的三分之一。
I've asked them to give a brief presentation about the Masters of Applied Positive Psychology at U Penn, the only master degree, well the first master degree in the world-- there are a couple of others now.
我请他们简单介绍一下,宾州大学应用积极心理学硕士课程,唯一的硕士学位,世界上第一个硕士学位-,目前还有其他几个。
The one that appears only in RNA is , the one that appears only in DNA is .
仅出现在RNA中的碱基是U,仅出现在DNA中的是T
PROFESSOR BAWENDI: So the question was, for an isothermal expansion, delta u does not change, therefore, The answer is that's true only for an ideal gas.
你的问题是,在等温过程中,内能是否,这只对理想气体成立。
So that you could see that for the ideal gas, u would not be a function of volume, but only of temperature.
所以我们可以看到对理想气体,内能不依赖于体积,而仅仅是温度的函数。
That u is a function of temperature only.
内能只是温度的函数。
We call an instrument of the U.S. Treasury with a maturity less than or equal to one year--we call that a bill and they used to be the only discount bonds issued by the U.S. Government.
我们把期限小于或等于一年的,国库券品种称为短期国库券,它们曾是美国政府,唯一发行的贴现债券
People have long thought that these kinds of things happen only in Japan but that's not true at all; it's happening right now in the U.S.
人们一直认为,这种事情只会在日本发生,但这种想法一点儿也不对;,它现在正发生在美国。
So for an ideal gas, we saw that u was only a function of temperature.
对于理想气体,我们知道内能只是温度的函数。
Just like u, we'd like to be able to express it in a way that allows us to calculate what happens only from equation of state data.
就像内能u一样,我们希望能够利用状态方程的数据,计算出其表达式,这些表达式能方便我们说出即将发生的过程。
Therefore, from experiments, u is only a function of temperature for an ideal gas, H and therefore from these experiments, 0 we come out with delta H dH/dp is equal to zero.
因此,从实验可以得出,对于理想气体u只是温度的态函数,因此从这些实验中我们得到Δ,偏H偏p等于。
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