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Reviewed CSCA Physics question · Easy

一定质量的理想气体，在温度不变的情况下，体积增大为原来的2倍，则压强变为原来的多少倍？

  1. 1/4
  2. 1/2
  3. 1
  4. 2
Show the answer and explanation

Correct answer

B. 1/2

Principle or equation

玻意耳定律（理想气体等温变化）：pV = 常量。

Why this answer is correct

温度不变，p1V1 = p2V2，V2=2V1，所以p2 = p1/2。

Example

若初始压强为4 atm，体积加倍后压强变为2 atm。

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