一、盖斯定律1840年瑞士的化学家盖斯(Hess)在总结大量实验事实的基础上提出:一个化学反应不管是一步完成的,还是多步完成的,其热效应总是相同的.这叫做盖斯定律.可以看出,盖斯定律实际上是“内能和焓是状态函数”这一结论的进一步体现.利用这一定律可以从已经精确测定的反应热 Gass’s Law The Swiss chemist Hess in 1840, based on a large number of experimental facts, proposed that a chemical reaction always has the same thermal effect, whether it is done in one step or multiple steps, which is called Gass’s Law It can be seen that Gass’s law is actually a further reflection of the conclusion that the “internal energy and enthalpy are the state functions.” This law can be used to derive from the well-characterized heat of reaction