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本文根据J.D.Vander Waals气体状态方程式(P+aN~2/V~2)(V-bN)=NRT给出一个计算单一实际气体P、V、T、N的程序。用FORTRAN语言编制,结构简单,通用性强,用户可随时查找所需要的气体常数值a和b值,不必花时间到别处查寻这些常数。本程序中使用DATA语句把34种气体的a、b值赋给了一个双精度变量数组,并设有整型变量,便于用户在实验条件改变时需要重新计算原来那个量或别的量时,可利用整型变量来控制再次进行选择。从输入数据到输出结果,只需20秒钟,几分钟内可得到许多组计算结果。本程序除了可以计算单一实际气体外,对不同种气体的a、b采取数学组合后,可用来计算混合实际气体。
In this paper, a program to calculate the single real gas P, V, T, N is given according to J.D. Van der Waals gas state equation (P + aN ~ 2 / V ~ 2) (V-bN) = NRT. With FORTRAN language, simple structure, versatility, the user can always find the required gas constant values a and b values, do not have to spend time looking up these constants elsewhere. This program uses the DATA statement to 34 gas a, b value assigned to a double-precision variable array, and with integer variables, user-friendly in the experimental conditions need to be recalculated when the original amount or other amount, You can use the integer variable to control the selection again. From input data to output results, it takes only 20 seconds to get many sets of calculations in minutes. In addition to the program can calculate a single actual gas, the different gases a, b take a mathematical combination can be used to calculate the mixed actual gas.