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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Szyszkowski equation ： ウィキペディア英語版 Szyszkowski equation The Szyskowski Equation〔B. von Szyszkowski, Z. physik. Chemie, 64, 385 (1908)〕 has been used by Meissner and Michaels〔H.P. Meissner, A.S. Michaels, Surface Tension s of Pure Liquids and Liquid Mixtures", Ind. Eng. Chem., 41(12), 2782, (1949)〕 to describe the decrease in surface tension of aqueous solutions of carboxylic acids, alcohols and esters at varying mole fractions. It describes the exponential decrease of the surface tension at low concentrations reasonably but should be used only at concentrations below 1 mole%.〔Bruce E. Poling, John M. Prausnitz, John P. O’Connell, The Properties of Gases and Liquids, 5th Edition〕 == Equation == :$\backslash sigma\_m\; =\backslash sigma\_w\backslash left(1-0.411\backslash log\backslash left(1+\backslash frac\backslash right)\backslash right)$ with: *σm is surface tension of the mixture *σw is surface tension of pure water *''a'' is component specific constant (see table below) *x is mole fraction of the solvated component The equation can be rearranged to be explicit in ''a'': :$\backslash begin$ a&=\frac-1}\right)}}\\ &=x10^-1}\right)} \end This allows the direct calculation of that component specific parameter ''a'' from experimental data. The equation can also be written as: :$\backslash gamma=\backslash gamma\_0-\backslash frac\backslash ln(1+K\_c)$ with: *γ is surface tension of the mixture *γ0 is surface tension of pure water *R is ideal gas constant 8.31 J/(mol *K) *T is temperature in K *ω is cross-sectional area of the surfactant molecules at the surface The surface tension of pure water is dependent on temperature. At room temperature (298 K), it is equal to 71.97 mN/m 〔NIST Chemistry WebBook http://webbook.nist.gov/chemistry/〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Szyszkowski equation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.