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Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is a. two times that of a hydrogen molecule b. same as that of a hydrogen molecule c. four times that of a hydrogen molecule d. half that of a hydrogen molecule

Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is
a. two times that of a hydrogen molecule
b. same as that of a hydrogen molecule
c. four times that of a hydrogen molecule
d. half that of a hydrogen molecule

Grade:11

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
9 years ago
Sol. According to kinetic theory, average kinetic energy (∈) = 3/2kBT Where, kB is Bo1tzmann’s constant. Since, it is independent of mlar mass, it will be same for He and H2 at a given temperature.

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