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MHT CET2009PhysicsKinetic Theory of Gases

To what temperature should the hydrogen at 327^ C be cooled at constant pressure, so that the root mean square velocity of its molecules becomes half of its previous value?

Options

  1. A-123^ C
  2. B123^ C
  3. C-100^ C
  4. D0^ C

Correct answer

A. -123^ C

Step-by-step solution

v_ ms 3 R T M array ll & T v_ rms ² & T₂ T₁ = [ v₂ v₁ ]²= 1 4 & T₂= T₁ 4 = (273+327) 4 & =150 ~K =-123^ C array

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