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Question

Two identical vessels contain helium and hydrogen at same temperature, then


  1. Average translational kinetic energy per mole of hydrogen = Average translational kinetic energy per mole of helium

  2. Average kinetic energy per mole of hydrogen =35 average kinetic energy per mole of helium

  3. Average kinetic energy per mole of hydrogen =53  average kinetic energy per mole of helium

  4. Average kinetic energy per mole of hydrogen = Average kinetic energy per mole of helium


Solution

The correct option is C

Average kinetic energy per mole of hydrogen =53  average kinetic energy per mole of helium


KT=32RT for one mole of any gas. Here, KT= average translational kinetic energy

KTotal=f2RT for one mole

Here, f = total degrees of freedom

= 3 for He (monoatomic)

= 5 for H2 (diatomic)

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