• This is real, unlike the Joule coefficient which is very small so that most gases have tiny Joule coefficients. So if you do a Joule experiment, you hardly measure a temperature change. With real gases, here you do actually measure it. You can feel it with your finger on your bicycle tire.

    系数那样小以至于,大多数气体的焦耳系数,都很小,所以如果你做焦耳实验,很难测量出温度的变化,对于真实气体,你可以测量它,你能通过手指按在,自行车轮胎上来感觉到它。

    麻省理工公开课 - 热力学与动力学课程节选

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