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Question

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


  1. 123°C

  2. - 123°C

  3. - 100°C

  4. C


Solution

The correct option is B

- 123°C


v=3RTMV1T1=V2T2v1v2=T1T24=600T2=150K=123 0C

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