Chemical Equilibrium. a) Briefly describe why (or how) it is possible to have an absolute value for the entropy of a system. b) Write appropriate inequalities for Gibbs free energy, Entropy and the Reaction Quotient that determine the direction of spontaneous change for forward, reverse or equilibrium processes. c) Briefly describe what you expect to occur as a function of time at a “single molecule" level for the chemical reaction AB=A +B9) at equilibrium. d) For the case of c how would you determine that the system is not at equilibrium?

Chemical Equilibrium. a) Briefly describe why (or how) it is possible to have an absolute value for the entropy of a system. b) Write appropriate inequalities for Gibbs free energy, Entropy and the Reaction Quotient that determine the direction of spontaneous change for forward, reverse or equilibrium processes. c) Briefly describe what you expect to occur as a function of time at a “single molecule" level for the chemical reaction AB=A +B9) at equilibrium. d) For the case of c how would you determine that the system is not at equilibrium?

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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Methane and hydrogen sulfide react to form carbon disulfide and hydrogen, like this: CH (g)+2H,S(g) - Cs,(g)+4H, (g) Suppose a mixture of CH, H,S, CS, and H, has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. dh perturbation change in composition shift in equilibrium to the right The pressure of CH, will O to the left Some CS, is removed. The pressure of H,S will O (none) O to the right The pressure of CH, will O to the left Some H,S is added. The pressure of CS, will O (none) |Privacy Accessibility Check Explanation O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Cip 60wa ORAshed plerof
Nitrogen monoxide and water react to form ammonia and oxygen, like this: 4 NO(g)+ 6H,O(g)→ 4 NH3(g)+50,(9) The reaction is endothermic. Suppose a mixture of NO, H,O, NH, and O, has come to equilibrium in a closed reaction vess perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibriL change in composition shift In equilibrium perturbation to the right O to the left The temperature is lowered. The pressure of 02 will O (none) O to the right O to the left ? The temperature is raised. The pressure of NO will O (none)
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Consider a reaction of the general form A B, which has an equilibrium constant (K) of 1.09 at 300 K. You may assume that this reaction can be approximated by a two-level system with an energy difference of Aɛ = ɛ1 - ɛ0 = 3.25 kJ/mol. Determine the ratio of the degeneracies of the product and reactant molecules. 2. Predict the equilibrium constant (K) of the above reaction at 600 K.
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Consider the equilibrium system described by the chemical reactionbelow. Calculate the value of Qc for the initial set reaction conditions in3.00 L container:8.65 g C2H4, 11.2 g O2, and 5.68 g CH3CHO. 2 C2H4(g) + O2(g) = 2 CH3CHO(g)
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The elementary reaction 2H2O(g)↽−−⇀2H2(g)+O2(g) proceeds at a certain temperature until the partial pressures of H2O, H2, and O2 reach 0.0500 atm, 0.00200 atm, and ,0.00650 atm, respectively. What is the value of the equilibrium constant at this temperature?