Maybe you're not looking at a reaction, but you've got some new compound, and you're looking at it go from liquid to solid or to gas.

也许你研究的不是一个反应,但你得到了一种新的化合物,你看着它从液体变成了固体或气体。

麻省理工公开课 - 热力学与动力学课程节选

Normally this is used for a reaction in the condensed phases and liquid usually.

通常它是用于凝聚态，液体相的反应,这是一个恒压量热计。

麻省理工公开课 - 热力学与动力学课程节选