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气体实验定律除了用公式表示外,还可以用图象描述,只要弄清图象中图线的某些关系就可利用图象来解决有关气体性质的若干问题,而且直观简便. 对于一定质量气体,分别在温度T_1和T_2条件下所作的等温变化,在p-V图上的图线Ⅰ和Ⅱ,如图Ⅰ所示.根据克拉珀龙方程pV=nRT可知,pV恒量跟热力学温度T成正比,可见图线Ⅰ和Ⅱ对应的温度 T_Ⅰ>T_l·即远离pV轴的曲线所对应的温度越高。
In addition to formulating a formula for gas experiments, it can also be described by images. As long as you can understand certain relationships in the image, you can use the image to solve several problems related to gas properties, and it is intuitive and simple. For a certain mass of gas The isothermal changes made at temperatures T_1 and T_2, respectively, are plotted on plots I and II on the pV plot, as shown in Fig. 1. According to the Krapellon equation pV=nRT, the pV constant is proportional to the thermodynamic temperature T. The temperature T_I>T_l, which corresponds to the lines I and II in FIGS. 1 and 2 , indicates that the temperature corresponding to the curve away from the pV axis is higher.