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in States of Matter by (80.9k points)
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Which of the following gas molecules have equal total kinetic energy and translational kinetic energy?

(a) O2

(b) He

(c) CH4

(d) N2

1 Answer

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Best answer

Correct option  (b) He

Explanation:

The total kinetic energy of a molecule is the sum of its translational, vibrational and rotational kinetic energies. The monatomic molecules do not possess vibrational and rotational kinetic energies. Hence, noble gases (like He, Ar etc.) fulfill the criteria.

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