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<p>We give here a brief and relatively simple derivation of the mean relative speed of two gas molecules moving according to&#xa0;the kinetic theory of an ideal gas. This account avoids both a lengthy or involved derivation and the plausibility argument used in some textbooks. We discuss also the extension to real gases that is possible in view of recent work.</p>

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The mean relative speed of two gas molecules

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月8日

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  • Iain L. MacDonald

摘要

We give here a brief and relatively simple derivation of the mean relative speed of two gas molecules moving according to the kinetic theory of an ideal gas. This account avoids both a lengthy or involved derivation and the plausibility argument used in some textbooks. We discuss also the extension to real gases that is possible in view of recent work.