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What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
State the basic assumptions of the kinetic theory of gases.
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Explain how the movement of molecules produces the pressure of a gas, and derive and use pV = ⅓Nm⟨c²⟩, where ⟨c²⟩ is the mean-square speed.
A simple model is sufficient: consider one-dimensional collisions, then extend to three dimensions using ⅓⟨c²⟩ = ⟨cₓ²⟩.
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Understand that the root-mean-square speed c_r.m.s. equals √⟨c²⟩.
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By comparing pV = ⅓Nm⟨c²⟩ with pV = NkT, deduce that the average translational kinetic energy of a molecule is (3/2)kT, and recall and use this expression.
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