对多方过程的内能与热量变化的定性分析  

The Qualitative Analysis to the Change of Internal Energy and Quantity of Heat in Many-sided Process

作　　者：赵晓雨[1] 雷晓蔚[1] 

机构地区：[1]渝西学院物理学与电子信息工程系

出　　处：《渝西学院学报（自然科学版）》2003年第4期47-50,共4页

摘　　要：P—V图中任意一条曲线都代表系统的一种准静态过程 ,功的正负很容易从图上定性得出 ,而内能的变化与吸、放热的分析一般需要利用热力学第一定律与过程的特征方程 ,较为繁琐 ,本文运用数学知识结合物理图像给出了一种简捷的定性判断法 ,可以迅速、准确地得出结论 .Any curve in the picture P-V stands for a quasi-static process in the system .The positive and negative of work are easy to be got quasi in the picture, while the first law of thermodynamics and characteristic equation of process are generally needed when the change of internal energy and absorption of heat and exothermic are analyzed, which is very complicated. The essay, using mathematical knowledge combined with physical pictures, give a simple qualitative judgement and can draw a conclusion quickly and accurately.

关 键 词：P-V图 功 内能 热量 等温线 绝热线 斜率 

分 类 号：O551[理学—热学与物质分子运动论]