And typically, we'll be treating at least some cases where we're dealing with ideal gases in which case we can easily get delta u.

那么我们也可以定出功，对吧？,典型地，我们至少会处理,一些理想气体的情况。

麻省理工公开课 - 热力学与动力学课程节选

And if you put this in the well-ventilated area, if you prepare this outside, the h c n gas will actually be released into the air, so you're safe, you can eat it later.

而如果你把它们放在通风良好的地方，在室外处理，那么氰化氢气体,将会被释放到空气中，这样你就安全了，过后就可以吃了。

麻省理工公开课 - 化学原理课程节选

You've just done an adiabatic compression of the ideal gas, you can pretend there is an ideal gas.

这就是对理想气体的,绝热压缩，---我们把空气近似作为理想气体处理。

麻省理工公开课 - 热力学与动力学课程节选

The atoms or molecules in the gas don't know that there are other atoms and molecules in the gas, and then you end up with this universal property. All right, so gases that have this universal property, even when the pressure is not zero, those are the ideal gases.

可以忽略,这样就得到了理想气体的性质,在有限压强下,依然能保持这些性质的气体，被称为理想气体，本课中我们把大部分气体，都作为理想气体来处理。

麻省理工公开课 - 热力学与动力学课程节选