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Unformatted text preview: p 2 m/s 2 = √ 2 m/s = 1.4 m/s T1, T2 and T3 Stuff Speciﬁc heat c : dU = mc dT or c ≡ 1 m dU dT Ideal gas law: PV = Nk B T with k B = 1 . 38 × 1023 J/K Temperature and energy: K avg = 1 2 [ mv 2 ] avg = 3 2 k B T = ⇒ v rms ≡ q [ v 2 ] avg = r 3 k B T m Thermal energy of a gas: U = f 2 Nk B T Near room T , f ≈ 3 (monatomic gas), f ≈ 5 (diatomic gas), and f > 6 (polyatomic gas) f is called the number of molecular “degrees of freedom” Gas processes: heat is energy ﬂow from Δ T First Law: Δ U = Q + W Expansion or compression work: dW =P dV Adiabatic: TV γ1 = const. PV γ = const. γ = 1 + 2 / f...
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 Spring '11
 Furnstahl
 Quantum Physics

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