再用P-V图讨论理想气体直线过程的直观方法

Once Again Discuss the Linear Process of an Ideal Gas with the Audio-Visual Methods by the P-V Praph

本文从P-V图上直接判断理想气体直线过程中的能量转换，方法形象直观，判断迅速正确。

In this paper,the method for determing whether the internal of a system increase or decreas directly with the help of P-V graph is put forword.The procedure is fast and the result is correct.