V2EX real gas

Real Gas

释义 Definition

真实气体:指在一定条件下不完全遵守理想气体定律(\(PV=nRT\))的气体。真实气体分子之间存在相互作用力,并且分子本身占有体积,因此在高压、低温等情况下偏离理想行为更明显。(也常与 ideal gas 对比使用。)

发音 Pronunciation (IPA)

/ril s/

例句 Examples

A real gas does not perfectly follow the ideal gas law.
真实气体并不会完全遵守理想气体定律。

At high pressure and low temperature, a real gas shows significant deviations because intermolecular forces and molecular volume can no longer be ignored.
在高压、低温条件下,真实气体会出现明显偏离,因为分子间作用力和分子体积已不能忽略。

词源 Etymology

real 源自拉丁语 realis(“真实的、实际的”),经由法语进入英语;gas 是17世纪由佛兰芒化学家范海尔蒙特(Jan Baptista van Helmont)创造的词,用来指代类似“空气”的物质。组合成 real gas,在物理化学与热力学语境中表示“现实中具有分子间作用与有限体积的气体”,用以别理想化模型。

相关词 Related Words

文学与名著中的用例 Literary Works

  • J. D. van der Waals:《On the Continuity of the Gaseous and Liquid States》(1873)用状态方程描述真实气体与液体的连续性,是“真实气体”研究的经典源头之一。
  • Francis W. Sears & Gerhard L. Salinger:《Thermodynamics, Kinetic Theory, and Statistical Thermodynamics》以真实气体偏离理想气体为核心例子讲解状态方程与可压缩因子。
  • Peter Atkins & Julio de Paula:《Atkins’ Physical Chemistry》在物理化学教材中系统讨论真实气体、范德华方程与实验偏差。
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