| 单词 | 压强 |
| 释义 | 压强 Pressure and temperature, right. Melting ice masses change the pressures on the underlying earth, which can lead to earthquakes and tsunamis, but that's just the beginning. And at some point the chemical potentials will equalize because of the change in pressure. You know how pressure changes with temperature at constant volume if you know the equation of state. If I place my container of gas on the table here, and I come back an hour later, the pressure needs to be the same when I come back Otherwise it's not equilibrium. As you drum your fingers against the steering wheel, you can feel the stress and pressure building. So the expansion against lower pressure draws less heat from the hot reservoir right. So, you increase the pressure from one bar to100 bar. And so if you want to know everything about this mixture, all you need is the temperature and the total pressure. So at our initial pressure, we just have all liquid. So that puny little pressure ends up being meters high. It relates the pressure, volume, and temperature together. It could be the pressure. It should be a pressure which is a force per unit area. It uses an A4- size piece of piezoelectric film in a T-shirt to absorb pressure from sound waves. Let me do it in blue. The total pressure if you add up these two straight lines together, you got another straight line. We raise the pressure. But we need to worry about what happens at different pressures. We can change the pressure. Next time we'll talk about the temperature dependence and the pressure dependence of equilibrium constants. The same conditions of pressure and temperature. How to follow events on them as you change pressure in a diagram like this. This tells me what happens at equilibrium to the amount of NO2 as I change the total pressure. There's our condition for equilibrium at constant temperature and pressure. This is a point that is often confusing, because you can think, well maybe I could calculate what the internal pressure is even for this very rapid process. Which means that if you know the temperature and pressure, then you still know everything. At the coexistence point. And this reference pressure, we took as one bar. And there is no work done on the surroundings because pressure is zero. The idea that the physical things behave as they do, not because they have anything analogous to desires but rather because they bump into each other , push each other, either by pressure of impact. |
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