盖斯定律英语

请帮我用英语定义一下盖斯定律 alevel书上的

你们没明白我的意思 defined the hess，s law

Hess's law
The law states that the energy change for any chemical or physical process is independent of the pathway or number of steps required to complete the process provided that the final and initial reaction conditions are the same. In other words, an energy change is path independent, only the initial and final states being of importance. This path independence is true for all state functions.

一确定的化学反应的恒容热或恒压热只取决于过程的始态与末态，而与中间的途径无关，这就是盖斯定律。例如： a式： c + co2==co2 b式：1.c +1/2o2==co 2.co+1/2o2==co2 就是说b式的焓变，熵变由1，2相加而来，所得结果与a式相同。

Hess's law 不管化学反应是一步完成的，还是分几步完成的该反应的热效应相同。

Hess' law is a relationship from physical chemistry named for Germain Hess, a Swiss-born Russian chemist and doctor. The law is based on the principle of conservation of energy and the path independence of energy changes. Hess' law can be used to predict energy changes that are not easily measured.