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本文从逸度表示的平衡常数(K_f)的定义出发,推导出关系式:lgK_f-lgK_r一△nlgP=F(x).令Z=lgK_f-lgK_r-△nlgP,将x=(?)(Z)、%G=F(Z)和同一反应类型的诸反应的计算参数标在同一个平面图上,这样就可以从图中迅速地算出不同T、P下的x和%G.在高压方面计算了(1/2)N_2+(3/2)H_2=NH_3,在200—500℃和10—1000atm范围内的42个G%值,与公认的实验值比较,其绝对差值小于1.5%.而与Dr.S.Peter,H.Wenzel(1973)的精确计算值比较,两者与实验值的绝对差值都在同一数量级.在常压方面,计算了A=2B类型的7个反应,所算得的一百多个数值与许多作者的数据是一致的.并用电子计算机和此图解法计算了CO_2+C=2CO反应的51个%G值,两者的差值均在千分之几的范围内.这样不仅在理论上把高压和常压下的计算统一起来,而且对实际应用也很有价值,这将有利于改进目前手册中缺乏x和%G值的情况.
In this paper, we start from the definition of fugacity constant (K_f) and deduce the following relation: Let lgK_f-lgK_r-ΔnlgP = F (x) Let Z = lgK_f-lgK_r- △ nlgP, ),% G = F (Z) and the calculation parameters for the reactions of the same reaction type are plotted on the same plan so that x and% G for different T, P can be quickly calculated from the plot. 42 G% values of (1/2) N_2 + (3/2) H_2 = NH_3 in the range of 200-500 ° C and 10-1000atm, which are less than 1.5% of the absolute value of the experimental values Compared with the accurate calculation of Dr.S.Peter and H.Wenzel (1973), the absolute value of the difference between them and the experimental value are in the same order of magnitude. At atmospheric pressure, seven reactions of type A = 2B were calculated, The calculated value of more than one hundred is consistent with the data of many authors, and the 51% G value of the CO 2 + C = 2CO reaction is calculated by the computer and the graphic method, the differences between the two are in the thousandths This not only unifies the theoretical calculation of high pressure and atmospheric pressure, but also is of great value in practical applications, which will help to improve the lack of x and% G values in current manuals.