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教科書中關於氣體擴散實驗的錯誤

Mistaken Ideas of Diffusion in Chemistry Textbooks

摘要


本文指出現行高中化學課本,在氣體擴散實驗與習題,有部分觀念不清之處。格銳目(Graham)擴散定律適用於兩種狀況,氣體於多孔固體中的等壓擴散,以及通孔擴散(effusion)。但高中化學課本中的NH3與HCl在一條長管擴散實驗則不適用。我們並對即將採用的新教材,針對此一議題作一比較。

並列摘要


This article summarizes some mistaken ideas of diffusion and effusion in current chemistry textbooks. There are only two conditions where Graham's law apply in diffusion experiments: (a) diffusion across isobaric porous barrier (b) Effusion through a hole to vacuum. The standard mutual diffusion experiment of NH3 versus HCl does not satisfy the condition of Graham's law. Finally, we make a comparison concerning diffusion in the new editions of Taiwan's high school textbooks.

並列關鍵字

Diffusion Effusion Cross section Graham's Law

被引用紀錄


林榮俊(2001)。以示範實驗式群測與模型模擬教學探討國中學生的擴散概念〔碩士論文,國立臺灣師範大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0021-1904200709435835

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