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Question

What happens when gas is compressed?


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Solution

  1. When gas is kept in a vessel, the gaseous particles keep colliding with each other as well as on the walls of the containing vessel.
  2. Due to this pressure gets exerted on the walls of the containing vessel.
  3. According to the kinetic theory of gases, the molecules of a gas are apart from each other at vast distances such that the actual volume of the molecules is negligible as compared to the total volume of the gas.
  4. When a gas is compressed, its volume decreases. The gas molecules are no longer far apart from each other.
  5. These molecules collide with each other and also with the wall of the container more frequently.
  6. As a result, there is an increase in pressure.
  7. So, when the gas undergoes compression, there is a decrease in pressure with an increase in volume.


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