pV=RT dT here because the pressure is constant, dV=RdT/p so dV is equal to R over p dT.

因为对1摩尔气体有，于是。

麻省理工公开课 - 热力学与动力学课程节选

P dV is equal to R dT. pV = RT for 1 mole, pdV=RdT so I just take dV here.

对等压过程，那么。

麻省理工公开课 - 热力学与动力学课程节选

It's kind of ironic that we put this in the same lecture as we talk about atomic radii, which we also call r, but they're two different r's, so you need to keep them separated in terms of what you're talking about.

有点讽刺的是,我们在同一堂课里还讨论过了原子半径，它也是用，r，表示的，但是它们具有不同的意义，因此大家需要注意区分它们,弄清楚我们讨论的是哪一个。

麻省理工公开课 - 化学原理课程节选

So, what's one over R to the 8th going to look like on this scale?

所以R分之一的8次方,在这种情况下会是什么样？

麻省理工公开课 - 固态化学导论课程节选

Were going to make it for a mole of gas, T1 so it's R times T1, V and then we'll have dV over V.

假设是有一摩尔气体，那么就是R乘以，然后有dv除以。

麻省理工公开课 - 热力学与动力学课程节选

So, you can see, it's much easier to describe that as one term, r here, instead of using both y and z.

所以，你们可以看到，用r而不是y和z来做描述，使得它变得更为简单。

麻省理工公开课 - 化学原理课程节选

So, we can get from these energy differences to frequency h by frequency is equal to r sub h over Planck's constant 1 times 1 over n final squared minus 1 over n initial squared.

所以我们通过不同能量,得到不同频率，频率等于R下标,除以普朗克常数乘以1除以n末的平方减去。

麻省理工公开课 - 化学原理课程节选

So, the number of nuclei, 119 if we were to sit and count these as well, is 119. So, we'll multiply that by just pi, r squared, to get that cross-section, and divide all of that by 1 . 39 meters squared.

如果你们数的话，原子核的数是，我们用它乘以πr的平方，得到横截面积，除以1。39平方米。

麻省理工公开课 - 化学原理课程节选