1、Hess 'Law states that for any chemical reaction, the energy change is path independent.
蓋斯定律表明，對于任意化學(xué)反應(yīng)，能量變化并非是路徑依賴的。

2、Let's see that a little more explicitly by just calculating out the free energy change of mixing.
讓我們通過計算出，混合物中自由能的變化，使問題更加清楚。

3、What is the energy change going from two atomic hydrogens to one H2?
什么是能量的改變，從兩個原子氫到H2分子？

4、Two kinds of energy change occur in exchanges.
在換熱器內(nèi)發(fā)生兩類能量變化。

energy change翻譯