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由于缺少高温实验数据,因此如何从298K时水溶液中离子的标准生成自由能去估算高温时的表观标准生成自由能,对从事水热成矿实验的地质工作者是一件很有意义的事情。本文颇为详细地介绍了С.Н.Лъвов的方法。用变数转换的办法,我们得到了一个能够便于利用现成数据的计算方程。按照这个方程我们算得了水饱和条件下,348K到623K温度范围内38个离子的高温表观标准生成自由能。我们还运用该法计算了某些离子的(ΔG_(f,?,T)~?-G(f,?,298)~?),并将它与用H.C.Helgeson方法和P.R.Tre-malne方法所算得的数值作了比较。用此法重算出的,NaCl在水中的高温表观标准溶解自由能和高温饱和pKw与实验数据很好地符合。
Due to the lack of high-temperature experimental data, how to estimate the apparent standard free energy of formation at high temperature from the standard free energy of ions in aqueous solution at 298K is of great significance to the geologists engaged in hydrothermal mineralization experiments . This article introduces the method of С.Н.Лъвов in more detail. Using a variable-shift approach, we have a computational equation that makes it easy to leverage off-the-shelf data. According to this equation, we calculated the apparent free energy of 38 ions in the temperature range of 348K to 623K under water saturation conditions. We also used this method to calculate the (ΔG_ (f, T, T) ~ -G (f, ..., 298) ~?) For some ions and compare it with the HCHelgeson method and the PRTre-malne method Calculated values were compared. Calculated using this method, NaCl in water at high temperature apparent standard solution free energy and high temperature saturation pKw and experimental data in good agreement.