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Reviewed CSCA STEM Chinese question · Easy

在物理公式 pV = nRT 中,R 表示什么?

  1. 气体常数
  2. 压强
  3. 体积
  4. 温度
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Correct answer

A. 气体常数

Principle or equation

理想气体状态方程 pV = nRT 中,R 是摩尔气体常数。

Why this answer is correct

该公式描述理想气体状态,R 为普适气体常数,数值约为 8.314 J/(mol·K)。

Example

1 mol 理想气体在标准状况下,p=1 atm,T=273 K,V≈22.4 L,代入可求 R。

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