我们在化学中所做的很多都是在恒定的温度和压强下进行的。

So much of what we do in chemistry does take place with constant temperature and pressure.

youdao

好，现在系统有恒定的温度，因为它是绝热的。

OK, so we have constant temperature, because it's isothermal.

youdao

空调系统维持恒定的温度。

Geo-thermal heating and cooling maintain constant temperatures.

youdao

To ask questions like how much heat is released in a chemical reaction that takes place at constant temperature.

当我们想要知道,当一个化学反应在恒定的温度下发生时,会放出多少热量时。

麻省理工公开课 - 热力学与动力学课程节选

Whereas under these conditions, these quantities, if you look at free energy change, for example at constant temperature and pressure, H you can still calculate H.

但是，在这些条件下，这些物理量，如果我们考察自由能的变化,例如在恒定的温度和压强下，我们仍然可以计算。

麻省理工公开课 - 热力学与动力学课程节选

And in particular let's look at, for example, du/dV du/dV at constant temperature.

更特殊一点考察，恒定温度下的。

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