The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmann‟s constant, T = absolute temperature) ?
Correct answer: B. √(3KT/m)
- A. √(2KT/m)
- B. √(3KT/m)
- C. √(6KT/m)
- D. 3KT/m
Explanation
From the kinetic theory of gases, the mean square speed is related by u² = 3KT/m. Taking the square root gives u = √(3KT/m), not the most-probable speed formula √(2KT/m).
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