Problem_Set__10 - c) Calculate the value of the equilibrium...

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Chemistry 2080 Spring 2009 Problem Set #10 - due date: Friday, April 24th at 2 pm Name:________________ Lab TA Name:__________________ Lab Day/Time:______________________ Practice problems (not graded). Chapter 19 : 7, 15, 17, 22, 23, 31, 35, 39, 53, 63 1) Iron(III) oxide can be reduced with carbon monoxide to make metallic iron. The carbon monoxide becomes oxidized to carbon dioxide: Fe 2 O 3 (s) + 3CO(g) –––––> 2Fe(s) + 3CO 2 (g) We have the following values of Δ f and S° for the four components of this reaction: Fe 2 O 3 (s) CO(g) Fe(s) CO 2 (g) Δ f {kJ/mol} -824.2 -110.5 0 -393.5 {J/(K.mol)} +87.40 +197.7 +27.28 213.7 a) Calculate the standard free-energy change for the above reaction at 25°C. b) Would the reaction as written be spontaneous under standard-state conditions at 25°C ?
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Unformatted text preview: c) Calculate the value of the equilibrium constant for the above reaction at 25C. d) Would the reverse reaction become spontaneous at higher temperatures? 2) The Haber synthesis of ammonia from nitrogen and hydrogen is as follows: N 2 (g) + 3H 2 (g) > 2NH 3 (g) (a) Using only the following data for ammonia ( H f = 46.1 kJ/mol, and G f = 16.5 kJ/mol); calculate H and S for the reaction at 25C (b) Account for the sign of S (c) Is the reaction spontaneous under standard-state conditions at 25C ? Explain. (d) What are the equilibrium constants K p and K c for the reaction at 350 K? (You may assume that H and S are both independent of temperature)....
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Problem_Set__10 - c) Calculate the value of the equilibrium...

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