Right now we told you Joule did all these experiments and he found out that for an ideal gas, that the limit in and ideal gas 0 case was that the eta J was equal to zero.

现在我告诉你们焦耳,做了所有这些实验,他发现对于理想气体,在极限情况下理想气体的ηJ等于。

麻省理工公开课 - 热力学与动力学课程节选

And so now we have this quantity, p times v bar, and the limit of p goes to zero is equal to a constant times the temperature.

不仅仅对氢气或氮气适用，在p趋于0的极限下,它适用于任何气体。

麻省理工公开课 - 热力学与动力学课程节选

And so they defined them, p after many experiments, the limit of this 0 delta T delta p and the limit of delta p goes to zero as the Joule-Thomson coefficient.

他们定义了这些量，以及它们的范围，ΔT比Δ,Δp的极限趋近于,叫做焦耳-汤姆逊系数。

麻省理工公开课 - 热力学与动力学课程节选

The property is the limit as p goes to zero of pressure times molar volume.

与摩尔体积的乘积,在气体压强p趋于0时的极限。

麻省理工公开课 - 热力学与动力学课程节选