ChemEquilibriumEPSolnME501Fall2011

ChemEquilibriumEPSolnME501Fall2011 - ME 501 Chemical...

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ME 501 Chemical Equilibrium Example Problem A rigid pressure vessel with a volume of 1 m 3 contains 0.1 kmols of diatomic oxygen (O 2 ) at 300K. The gas is heated to 3000 K. How many O-atoms (monatomic oxygen) does the pressure vessel contain at 3000 K, and what is the assembly pressure in Pascals? Hint: Consider the reaction OO 2 2 . Also, remember that P N k T B   Assume that diatomic oxygen is a rigid rotator and harmonic oscillator, neglect any ionization, and use the following characteristic temperature and dissociation energy data: rot (K) vib (K) ( D 0 /hc ) (cm -1 ) O 2 2.08 2280 41,300 Consider the following electronic levels: O 2 : Level 0: gh c c m 00 1 30 ,( / ) Level 1: c c m 11 1 27 , ( / ) ,920 O: Level 0: c c m 1 50 / ) Level 1: c c m 1 3 158 / ) Level 2: c c m 1 1 226 / ) Initially, 25 , 6.022 10 B PN k TN  For  2 22 2 0 20 0 , 25 25 2, e x p 2 2 6.022 10 1.2044 10 O B NZ D D D k T NN       At 3000 TK : ,, 3/2 , 2 2 O O trans O elec OB B O trans O ZZ Z mkT kT Zm hh 
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This note was uploaded on 12/26/2011 for the course ME 501 taught by Professor Na during the Fall '10 term at Purdue University-West Lafayette.

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ChemEquilibriumEPSolnME501Fall2011 - ME 501 Chemical...

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