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IDEAL GAS Assumptions: 1. Non-Interacting molecules 2. Perfectly elastic collisions 3. Large number of molecules 4. Separation between molecules >diameter of a molecule

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IDEAL GAS System– particular object or set of objects Microscopic view – details of molecular motion Macroscopic view – description based on 10 6 -10 10 or more molecules and are sensible with transducers to measure P, V, T, N, M. Most often P, V, T, N are state gas variables

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IDEAL GAS PV = constant (T const) Boyles Law P(1/T) = constant (V const) Gay-Lussacs V(1/T) = constant (P const) Charles Law PV/(T) = nR (n=moles) R= 8.314 J/(mol K) = Nk (N =number of molecules) (k=Boltzmanns constant) R = N A k N A = 6.022 x 10 23 molecules k = 1.381 x 10 -23 J/K

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