Free expansion of a gas causes it to cool.

气体的自由膨胀会使其温度降低。

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That's the change in entropy in expansion, free expansion of a gas, V2 from V1 to V2.

这是扩散中的熵变，气体的自由扩散，从V1到。

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And the first one, the simplest one, maybe, to cover, is just free expansion of a gas.

第一个，或许是所涉及到的最简单的一个，就是气体的自由扩散。

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It turns out that this quantity here, which is called eta of J the Joule free expansion parameter, is not quite zero.

这个量后来被，称作焦耳膨胀系数,其实并不等于零。

麻省理工公开课 - 热力学与动力学课程节选

This one turns out to be the heat capacity, and this one turns out to be something that we measure in the Joule-free expansion.

其实，这就是热容，这是焦耳自由膨胀实验中,我们要测量的物理量。

麻省理工公开课 - 热力学与动力学课程节选

So the Joule free expansion involves opening this valve and asking what happens when this gas moves into the other bulb or distributes between the two.

焦耳自由膨胀就是,打开阀门后的过程,气体从一个腔跑到另一个腔,并在它们之间平均分配。

麻省理工公开课 - 热力学与动力学课程节选

All told, it sounds pretty robust for a free expansion.

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This tapering off of expansion should free up cash to pay down debt, enlarge the dividend and fund a new share buyback plan.

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But Lib Dem peer and former education spokesman, Lord Willis, said the expansion of free schools would depend on allowing providers to make a profit.

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