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Helium atom is two times heavier than a hydrogen molecule.At 298 K,the average kinetic energy of helium atom is______ energy of hydrogen molecule? IT is given that for kinetic energy is independant of mass. But KE=1/2mv^2 so it does depend on mass doesnt it?

Helium atom is two times heavier than a hydrogen molecule.At 298 K,the average kinetic energy of helium atom is______


energy of hydrogen molecule?


IT is given that for kinetic energy is independant of mass. But KE=1/2mv^2 so it does depend on mass doesnt it?

Grade:11

1 Answers

vikas askiitian expert
509 Points
10 years ago

kinetic energy of gas molecules =fkT/2 ,

it depends on temperature and degree of freedom of gas...

for hydrogen(di atomic) f=5 & for helium(monoatomic) f=3

so kinetic energy is independent of mass

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