克拉珀龙

我们回到克拉珀龙方程，考虑这个近似之后共存曲线的dp/dT等于dH除以，再除以气体的体积。

If you go back to the to the Clapeyron equation up here , T with this approximation then dp / dT , V the coexistence line , is delta H divided by T V gas .

根据克拉珀龙方程、分子流运动论的Knudsen公式等理论，确定达到额定压力（真空度）所需的时间（即装置的起动时间）。

The time which the vacuum degree can reach the decided value ( i.e. starting time of the equipment ) is calculated by Clapeyron ′ s equation of gas state , Knudsen theory of molecular flow and etc.

升华或者蒸发，这就是克劳修斯&克拉珀龙方程。

Sublimation or vaporization , and this is the Clausius-Clapeyron equation .

这是你会看到的另外一种，克劳修斯-克拉珀龙方程。

So that 's another form that you 'll see .

根据克劳修斯&克拉珀龙方程，你会得到一条直线。

And according to Clausius-Clapeyron , that should give you a straight line .

因为这个共存曲线，相图和克拉珀龙方程，都是对纯物质得到的。

Because this gas liquid coexistence line , this diagram , and this Clapeyron equation , is all done for a pure substance .

我们做一个简短的回顾，然后继续讨论克劳修斯-，克拉珀龙方程，然后看我们能把这个方程推广到什么地步。

Let 's do a one minute review , & and then move onto the Clausius-Clapeyron equation and see how far we can go on that .