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关于临界常数的經驗計算方法,研究的人很多。但是由于每个临界常数本身都不具备加和性的必要条件,故不能把它們直接作为加和性常数来計算。而不采用加和法,則难以获得滿意的結果。或者失之不准,或者只能用于少数物貭。为了利用加和法来計算临界常数,有些人把某一临界常数的某种函数,例如乘以若干次方,或者把几种常数結合起来作为加和性常数。但其中有些結果只能用于少数物貭,如烷烃之类。
There are many people who study the empirical calculation of critical constants. However, since each of the critical constants does not have the necessary conditions of additiveness, they can not be directly calculated as additive constants. Without the addition method, it is difficult to obtain satisfactory results. Or not sure, or only for a few things. In order to use the summation method to calculate the critical constant, some people multiply some function of a certain critical constant, for example by several orders, or combine several constants as additive constants. But some of these results can only be used for a few things, such as alkanes and the like.