HW1SolnME525SP2011

HW1SolnME525SP2011 - 1 ME 525 SP2011 Homework #1 Due...

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1 ME 525 SP2011 Homework #1 Due Thursday, January 27, 2011 Prof. Lucht (E-mail address: Lucht@purdue.edu) 1. Turns, Problems 2.17 and 2.18.
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5 2. Use the routine HPFLAME (on the disc included with the book) to calculate the equilibrium properties of the products of acetylene/air combustion at a constant pressure of 1.0 atm at equivalence ratios = 0.5, 1.0, 1.25, and 1.5. Repeat the calculations for a pressure of 10 atm. (a) Verify from the output mole fractions at P = 1.0 atm that the following reactions are in equilibrium for = 0.5 and 1.5: CO 2 H 2 H 2 O CO O 2 H 2 H 2 O O CO 2 CO O (b) Plot the flame temperature as a function of equivalence ratio for the two pressures. Where does the peak flame temperature occur? (c) Plot the species H 2 , H 2 O, O, H, OH versus equivalence ratio for the two pressures. Comment on the relative degree of dissociation at the two pressures. (a) To verify that the reactions are in equilibrium we need to calculate the equilibrium constant (1) using the mole fractions in OUTPUT.HP and (2) using the standard Gibbs free energy of
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HW1SolnME525SP2011 - 1 ME 525 SP2011 Homework #1 Due...

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