That is when governments will meet to hammer out an agreement on climate change to replace the 1997 Kyoto Protocol on gas emissions.

VOA: standard.2009.08.31

And so that means that delta u is always calculable from Cv dT for any ideal gas change.

这意味着对理想气体,Δu只需利用Cv，dT计算。

麻省理工公开课 - 热力学与动力学课程节选

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。

麻省理工公开课 - 热力学与动力学课程节选

Under his stewardship, the European Union has adopted an ambitious climate-change program that aims to cut greenhouse gas emissions by 20 percent or more by 2020.

VOA: standard.2009.09.16

PROFESSOR BAWENDI: So, for an ideal gas, the isothermal is the easy one because the energy doesn't change.

对理想气体，等温过程最简单,因为能量不变。

麻省理工公开课 - 热力学与动力学课程节选

How many moles of gas are there in each case, in reactants and products? If that changes, of course you know that the pressure in there is going to change at constant volume if the amount of gas in there is changing.

在反应物和生成物中，各有多少摩尔的气体？,如果它发生了变化,当然在等体条件下，如果气体的总量,发生了变化，压强也会发生变化。

麻省理工公开课 - 热力学与动力学课程节选

Therefore, if it's isothermal, the energy of the ideal gas doesn't change.

理想气体的，能量不变。

麻省理工公开课 - 热力学与动力学课程节选

The ideal gas constant doesn't change, temperature doesn't change, and so v we just have minus nRT integral V1, V2, dV over V.

理想气体常数不变，温度也不变，因此,是负的nRT，积分从v1到v2，dv除以。

麻省理工公开课 - 热力学与动力学课程节选