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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 Vapour pressure of water ： ウィキペディア英語版 Vapour pressure of water The vapor pressure of water is the pressure at which water vapor is in thermodynamic equilibrium with its condensed state. At higher pressures water would condense. The water vapor pressure is the partial pressure of water vapor in any gas mixture in equilibrium with solid or liquid water. As for other substances, water vapor pressure is a function of temperature and can be determined with Clausius–Clapeyron relation. ==Approximation formula == The vapor pressure of water may be approximated by the following relations (in order of increasing accuracy): *:$P\; =\; \backslash exp\backslash left(20.386-\backslash frac\backslash right)\backslash ,\backslash mathrm$ *::where is the vapor pressure (mmHg) and is the temperature in Kelvin. * Using the Antoine equation *:$\backslash log\_P\; =\; A\; -\; \backslash frac$ *::where the temperature  is in degrees Celsius and the vapor pressure  is in (mmHg). The constants are given as 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「Vapour pressure of water」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.