2. Ammonia is produced by the Haber process, in which nitrogen and hydrogen are reacted directly using an iron mesh impregnated with oxides as a catalyst. For the reaction N2(g) + 3H2(g)= 2NH3(g) equilibrium constant (Kp values) as a function of temperature are 300 °С, 4.34 х 10-3 500 °С, 1.45 х 10-5 600 °С, 2.25 х 10-6 (a) Is the reaction exothermic or endothermic? Explain why. (b) Calculate AH° from the data using the van't Hoff equation: (K2 In ΔΗ rxn T2. Is the sign of AH° in your answer consistent with your answer for (a)?

2. Ammonia is produced by the Haber process, in which nitrogen and hydrogen are reacted directly using an iron mesh impregnated with oxides as a catalyst. For the reaction N2(g) + 3H2(g)= 2NH3(g) equilibrium constant (Kp values) as a function of temperature are 300 °С, 4.34 х 10-3 500 °С, 1.45 х 10-5 600 °С, 2.25 х 10-6 (a) Is the reaction exothermic or endothermic? Explain why. (b) Calculate AH° from the data using the van't Hoff equation: (K2 In ΔΗ rxn T2. Is the sign of AH° in your answer consistent with your answer for (a)?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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N₂(9)+ 3H₂(g) → 2NH₂(9) At the temperature the engineer picks, the equilibrium constant K, for this reaction is 0.0069. The engineer charges ("fills") three reaction vessels with nitrogen and hydrogen, and lets the reaction begin. He then measures the composition of the mixture inside each vessel from time to time. His first set of measurements are shown in the table below. Predict the changes in the compositions the engineer should expect next time he measures the compositions. reaction vessel B compound N₂ 16₂ NH, N₂ H₂ E NH, N₂ H₂ NH, pressure 32.93 am 21.78 atm 43.94 atm 37.26 am 23.66 $8.50 m 32.56 atm 20.68 atm 44.67 an expected change in pressure O increase O increase O increase O increase O Increase Ot increase O decrease O decrease decrease O Increase O increase O O Increase O decrease O decrease Odecrease O decrease decrease decrease O(no change) O (no change) O(no change) O(no change) O (no change) (no change) (no change) O (no change) (no change)
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Use the data in the supporting materials to calculate the equilibrium constant (Kp) for the following reaction at 25°C. 2 SO2(g) + O2(g) =2 S03(g) Кра 4.24e24 Calculate Kp for the reaction at 49°C using the following equations. (a) the van't Hoff equation below. (P), A,H° RT? a In K Кр = 1.138e22 (b) the Gibbs-Helmholtz equations below to find A-G° at 49°C and hence, Kp at the same temperature. AG ΔΗ (i) = - T2 A-G2 A;G1 1 (ii) T2 T1 T1 Kp = 1.138e22 (c) A-G° = ArH° – TA¡S° to find A-G° at 49°C and hence, Kp at the same temperature. Кр 3D 1.7742е22 State the approximations employed in each case. The assumption that A,H° is temperature independent and equal to the value calculated at 298.15 K is required by all three parts A second assumption that AS° is temperature independent and equal to the value calculated at 298.15 K is required by part (c) Compare your results. The answers calculated in parts (a) and (b) ▼ in part (c) are very close as expected because the formulas used to…