匿名 發問時間: 科學化學 · 9 年前

莫爾數 發現者

莫爾數是誰發明的 謝謝

4 個解答

評分
  • sky
    Lv 4
    9 年前
    最佳解答

    亞佛加厥1832年,出版了四大冊理論物理學,其中寫下有名的假設:「在相同的物理條件下,氣體相同的體積,含有相同數目的原子。」但未被當時的科學家接受。法國物理學家讓·巴蒂斯特·皮蘭(法語:Jean Baptiste Perrin,)1909年使用不同實驗方法皆得到相近數值,把常數命名為亞佛加厥常數來紀念亞佛加厥。實際上亞佛加厥常數的值,最早由奧地利化學及物理學家約翰·約瑟夫·洛施米特(Johann Josef Loschmidt)於1865年所得,他透過計算某固定體積氣體內所含的分子數,成功估計出空氣中分子的平均直徑。前者的數值,即理想氣體的數量密度,叫「洛施米特常數」,就是以他命名的,這個常數大約與亞佛加厥常數成正比。由於亞佛加厥常數有時會用L表示,所以不要與洛施米特(Loschmidt)的L混淆,而在德語文獻中可能時會把它們都叫作「洛施米特常數」,只能用計量單位來分辨提及的到底是哪一個

    The atoms. Avogadro's constant. every mass of water, and in consequence each molecule of water, weighs 9 times the hydrogen it contains: the molecule of water, which contains 2 atoms of hydrogen, weighs therefore 18 times the atom of hydrogen. In a similar manner, it may be established that the molecule of methane, for example, weighs 16 times more than the atom of hydrogen. Thus, by a purely chemical method, through the conception of the atom, the ratio 16/18, of the weight of a molecule of methane to a molecule of water, can be reached. Now this same ratio, precisely, is arrived at by comparison of the masses of similar volumes of methane and water vapour in the gaseous state under similar conditions of temperature and pressure. Thus these two masses, which have the same ratio as the two kinds of molecules, must contain as many molecules the one as the other. This result is general for the different gases, so that in consequence we arrive, in an experimental manner, at the celebrated proposition enunciated in the form of an hypothesis by Avogadro, about a century ago, and taken up again a little later by Ampère:

    ref:

    1.http://zh.wikipedia.org/wiki/%E4%BA%9E%E4%BD%9B%E5...

    2.http://en.wikipedia.org/wiki/Avogadro_constant#His...

    3.http://web.lemoyne.edu/~giunta/perrin.html

    參考資料: wiki and net paper
  • 6 年前

    莫耳數又稱亞佛加厥常數 是羅伯特·密立根發現的

  • Yoyo
    Lv 5
    9 年前

    亞佛加厥常數這個名子只是用來紀念亞佛加厥

    他本人與這個數字一點關係都沒有...

  • 楓~
    Lv 5
    9 年前

    莫耳數又稱亞佛加厥常數 是亞佛加厥發現的

    參考資料: 自己
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