Hess's Law的定義

其實尼條law比較簡單
好有physics既風味

講緊既係整體enthalpy change=每個小步驟既enthalpy change+埋
可以用另1個方向去解
你做同1個reaction
分process做同單process做所吸既熱同放既熱一樣

好典型既例子就係話
Let H be standard enthalpy change
C+O2->CO2 H=-393.5kJmol-1

如果用C+1/2 O2->CO H=-110.5kJmol-1
再用CO+1/2O2->CO2 H=-283.0kJmol-1

-110.5 + -283.0 = -393.5!

001: You don't explain any importance of the invention of Hess's Law.

The Hess's Law aims to help us determine some enthalpy change of some reactions which cannot be found out through the experiment. This Law is very useful to find it.