2-GaseousEquilibria

2-GaseousEquilibria - S ulfuryl C hlo ride Eq uilib ria Pro...

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Unformatted text preview: S ulfuryl C hlo ride Eq uilib ria Pro b le m S e t Gaseous Equilibrium Edward A. Mottel Department of Chemistry Rose-Hulman Institute of Technology 05/11/09 Gaseous Equilibria Reading Assignment: Zumdahl Chapter 6.2-6.6 This lecture continues the topic of dynamic equilibrium with examples drawn from gaseous systems. Changes to the system can be predicted by Le Chtelier's Principle. 05/11/09 Gaseous Equilibria Starting a system from reactants Starting a system from products Predicting equivalent starting conditions 05/11/09 Water-Gas Shift Reaction The water-gas shift reaction is a useful industrial process to generate hydrogen gas. CO 2 (g) + H 2 (g) CO (g) + H 2 O (g) Wha t will a g ra ph o f the s te a m pre s s ure a s a func tio n o f tim e lo o k like ? S uppo s e 1 a tm o f C O a nd 1 a tm o f s te a m a re a llo w to re a c t in the pre s e nc e o f a c a ta lys t. 05/11/09 Water-Gas Shift Reaction CO 2 (g) + H 2 (g) CO (g) + H 2 O (g) 1.00 0.00 0.20 0.40 0.60 0.80 50 100 150 Time Pressure (atm) CO H2O CO2 H2 Wha t will the g ra ph o f the o the r g a s pre s s ure s lo o k like ? 05/11/09 Water-Gas Shift Reaction CO 2 (g) + H 2 (g) CO (g) + H 2 O (g) 0.00 0.20 0.40 0.60 0.80 1.00 50 100 150 Time Pressure (atm) CO H2O CO2 H2 05/11/09 CO 2 (g) + H 2 (g) CO (g) + H 2 O (g) At 605 K, the equilibrium pressures are P CO = 0.67 atm P H2O = 0.67 atm P CO2 = 0.33 atm P H2 = 0.33 atm What is the numeric value of the equilibrium constant for the reaction? Water-Gas Shift Reaction 05/11/09 CO 2 (g) + H 2 (g) CO (g) + H 2 O (g) Q = H O 2 ( ) ( CO ) P P ) ( ( ) P CO 2 P H 2 = = 0.25 = K p (0.33) (0.33) (0.67) (0.67) Water-Gas Shift Reaction 05/11/09 CO 2 (g) + H 2 (g) CO (g) + H 2 O (g) Suppose 1 atm of CO 2 and 1 atm of H 2 are allowed to react in the presence of a catalyst. Water-Gas Shift Reaction Wha t will a g ra ph o f the g a s pre s s ure s lo o k like ? 05/11/09 0.00 0.20 0.40 0.60 0.80 1.00 50 100 150 Time Pressure (atm) CO 2 (g) + H 2 (g) CO (g) + H 2 O (g) CO H2O CO2 H2 Water-Gas Shift Reaction 05/11/09 CO 2 (g) + H 2 (g) CO (g) + H 2...
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2-GaseousEquilibria - S ulfuryl C hlo ride Eq uilib ria Pro...

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