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Two containers, equal volume, one with H₂ and one with O₂ at same T, P. Ratio of:
AAll ratios equal
BRandom
Cv_rms: 4:1 (H₂ faster); KE per molecule: 1:1 (same T)
DCannot determine
Answer & Solution
Correct answer: C. v_rms: 4:1 (H₂ faster); KE per molecule: 1:1 (same T)
At same T: same average translational KE per molecule. But v_rms ∝ 1/sqrt(M). M(O₂)/M(H₂) = 32/2 = 16. v_rms(H₂)/v_rms(O₂) = sqrt(16) = 4. So H₂ molecules 4× faster but same KE.
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