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Which of the following decrease when a given mass of gas is compressed to half...

Chemistry
JAMB 2007

Which of the following decrease when a given mass of gas is compressed to half its initial volume?

  • A. Atomic radius of each
  • B. Average intermolecular distance
  • C. Frequency of collisions
  • D. Number of molecules presents
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Correct Answer: Option B
Explanation

When a gas is compressed to half its volume, the average intermolecular distance decreases because the same number of gas molecules are now confined to a smaller space, forcing them closer together, resulting in a smaller average distance between each molecule. 

Conversely, when the volume of a gas is reduced, the frequency of collisions between molecules increases; this is because the molecules have less space to move around, leading to more frequent interactions with each other and the container walls. 

There is an explanation video available below.


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Explanation Video

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