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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 Gas collecting tube ： ウィキペディア英語版 Gas collecting tube The characterization gas collecting tube describes an oblong gas-tight container with one valve at either end. Usually such a container has a gauged volume, has a cylindrical shape and is made of glass. Gas collecting tubes are used for science-related purposes; for taking samples of gases. Versions * Gas collecting tubes, made of glass, with 2 olives * as above, but with 2 stopcocks with glass plugs, without septum * as above, with septum * with PTFE plug, without septum * as above, with septum ''Capacity'' of gas collecting tubes 150, 250, 350, 500 and 1.000 ml ==Measurement of the Mass Density of a Gas - Aspirator Method 〔Physikalische Chemie, Kaiser, Hennig, Verlag Dr. Max Gehlen, Bad Homburg, 1983, Seite 140 (in German)〕== The mass density of a gas can be measured by using a gas collecting tube, an analytical balance and an aspirator. The mass and volume of a displaced amount of gas are determined: At atmospheric pressure $p$, the gas collecting tube is filled with the gas to be investigated and the overall mass $m\_$ is measured. Then the aspirator sucks out much of the gas yielding a second overall mass $m\_$ measurement. (The difference of masses represents the mass ($m=m\_-m\_$) of the extracted amount of gas.) Finally, the nearly evacuated gas collecting tube is allowed to suck in an outgassed liquid, usually previously heated water, which is offered under atmospheric pressure $p$. The gas collecting tube is weighed for a third and last time containing the liquid yielding the value $m\_$. (The difference of masses of the nearly evacuated tube and the liquid-containing tube gives the mass ($m\_=m\_-m\_$) of the sucked-in liquid, that took the place of the extracted amount of gas.) The given mass-density $\backslash rho\_$ of the liquid permits to calculate the displaced volume ($V=m\_/\backslash rho\_$). Thus giving mass $m$ and volume $V$ of the extracted amount of gas, consequently accessing its mass density ($\backslash rho=\backslash frac$) under atmospheric pressure 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「Gas collecting tube」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.