What we define as zero is the enthalpy of every element in its natural state at room temperature and ambient pressure.

我们将零点定义为每种元素,在室温和正常大气压下,在其自然状态下的焓。

麻省理工公开课 - 热力学与动力学课程节选

Water boils at different temperatures, depending on what the atmospheric pressure is; same thing for the freezing point.

丹佛和波士顿水的沸点，就不一样;,在不同的大气压下。

麻省理工公开课 - 热力学与动力学课程节选

And I didn't specify the conditions, but if we were to do this under ordinary chemical conditions of some, you'd say room temperature and pressure, right, they all happen spontaneously.

我并没有特别说明反应条件，但是如果我们在通常的化学条件下,实现这些化学反应，比如在室温和大气压下下，他们都是自发的。

麻省理工公开课 - 热力学与动力学课程节选

Where am I going wrong here?

在一个大气压下？

麻省理工公开课 - 热力学与动力学课程节选