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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 Mass diffusivity ： ウィキペディア英語版 Mass diffusivity Diffusivity or diffusion coefficient is a proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species (or the driving force for diffusion). Diffusivity is encountered in Fick's law and numerous other equations of physical chemistry. The diffusivity is generally prescribed for a given pair of species and pairwise for a multi-species system. The higher the diffusivity (of one substance with respect to another), the faster they diffuse into each other. Typically, a compound's diffusion coefficient is ~10,000× as great in air as in water. Carbon dioxide in air has a diffusion coefficient of 16 mm2/s, and in water its diffusion coefficient is 0.0016 mm2/s.〔(CRC Press Online: CRC Handbook of Chemistry and Physics, Section 6, 91st Edition )〕〔(Diffusion )〕 Diffusivity has an SI unit of m2/s (length2 / time). In CGS units it is given in cm2/s. ==Temperature dependence of the diffusion coefficient== 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「Mass diffusivity」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.