Step three to four isothermal compression, w2 delta u is going to be q2 plus w2.

第三步，到四点的等温压缩，Δu等于q2加。

麻省理工公开课 - 热力学与动力学课程节选

All right, so now let's see how we execute it, and do the calculations that allow us to calculate this. So, one, what's delta H in step one?

好，现在我们看看怎样操作它，怎样进行计算，第一步,步骤I的ΔH是多少？

麻省理工公开课 - 热力学与动力学课程节选