Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a — States of Matter and Gaseous State Chemistry Question
Question
Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is
Answer: B
💡 Solution & Explanation
Average kinetic energy per molecule/atom depends only on temperature (KE = 1.5 * k_B * T) and is independent of mass. At 298 K, both have the same average kinetic energy .
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