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Unformatted text preview: Chem 444 B Exam 1 Page 1 Chemistry 444 B Hour Exam #1 February 25, 2009 Each problem is worth 20 pts. 1. The RedlichKwong equation of state is given by: ( ) 1/ 2 ) RT A P V B T V V B ⎛ ⎞ ⎛ ⎞ ⎜ ⎟ = − ⎜ ⎟ ⎜ ⎟ − ⎝ ⎠ + ⎝ ⎠ a) Obtain an expression for the compressibility factor, PV Z RT = , of a gas governed by the RedlichKwong equation in terms of molar volume, temperature and the appropriate constants. Note A and B are positive constants. b) According to the RedlichKwong equation of state, under what conditions will the observed pressure be greater than ideal pressure? Less than? 2. Derive the average ensemble energy, the heat capacity at constant volume, and the pressure using the partition function for one mole of an ideal monotonic gas, by taking the appropriate derivatives (don’t just write down the expressions!). 3/2 2 [ ( , )] ( , , ) ! 2 where ( , ) N q V Q N V N m q V V h β β π β β = ⎛ ⎞ = ⎜ ⎟ ⎝ ⎠ 3. Molecular nitrogen is heated in an electric arc. The relative population of the excited 3....
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This note was uploaded on 04/08/2010 for the course CHEM 444 taught by Professor Jameslis during the Spring '08 term at University of Illinois at Urbana–Champaign.
 Spring '08
 JamesLis
 Chemistry, Physical chemistry, pH

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