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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The Knudsen effusion method with mass-spectrometric analysis of evaporation products is used to determine the composition and pressure of saturated vapor over liquid lithium in the temperature range from 627 to 893 K. The Li(l) = Li(g), 2Li(l) = Li2(g), and Li2(g) = 2Li(g) reactions are investigated. The measured values of partial pressure for Li and Li2are used to calculate the values of enthalpy for these reactions at 0 K by the second, Δ r H 0 0(II), and third, Δ r H 0 0(III), laws of thermodynamics: Δ r H 0 0(II) = 157.9 ± 0.5, 214.2 ± 0.6, and 101.4 ± 1.1 kJ/mol, and Δ r H 0 0(III) = 157.5 ± 0.3, 213.9 ± 0.3, and 101.1 ± 0.6 kJ/mol, respectively.