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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 Ebullioscopic constant ： ウィキペディア英語版 Ebullioscopic constant In thermodynamics, the ebullioscopic constant, Kb, allows one to relate molality to boiling point elevation. It is the ratio of the latter to the former: $\backslash mathrm$ i is the Vant Hoff factor. It is determined by whether the solute particles in the solution associate or dissociate. If all the particles of the solute trimerise (Three associate into one) the Vant hoff factor will be 1/3. If they dissociate into two particles (For example NaCl as solute which breaks into Na+ and Cl−), $\backslash mathrm$=2. $\backslash mathrm$ $\backslash mathrm$ - Ideal Gas constant $\backslash mathrm$ - Boiling point of liquid. $\backslash mathrm$- Latent heat of vaporisation per gram. Through the procedure called ebullioscopy, a known constant can be used to calculate an unknown molar mass. The term "ebullioscopy" comes from the Greek language and means "boiling measurement." This is related to cryoscopy, which determines the same value from the cryoscopic constant (of freezing point depression). This property of elevation of boiling point is a colligative property. It means that the property, in this case $\backslash Delta\; \backslash mathrm$ depends on the number of particles dissolved into the solvent and not the nature of those particles. ==Some Kb values〔P. W. Atkins, ''Physical Chemistry'', 4th Ed., p. C17 (Table 7.2)〕== 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「Ebullioscopic constant」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.