(a)
Interpretation: The mixture at equilibrium needs to be estimated for K equal to 2.0.
Concept Introduction: For any reaction, the reaction quotient can be calculated by taking the ratio of the concentration of the product to the reactant. For a reaction at equilibrium, the reaction quotient is equal to the equilibrium constant.
(b)
Interpretation: The three mixtures need to be ranked from lowest to highest change in Gibbs free energy.
Concept Introduction: For a spontaneous reaction, the sign of change in Gibbs free energy is negative. If the value of Q is less than K, the reaction moves in the right direction to increase the concentration of the product. Also, if the value of Q is greater than K, the reaction moves in the left direction to increase the concentration of reactants.
(c)
Interpretation: The sign of change in Gibbs free energy of reaction needs to be identified if each non-equilibrium mixture approaches equilibrium.
Concept Introduction: Any reaction moving spontaneously will have a negative value for change in Gibbs free energy.
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CHEMISTRY: THE MOLECULAR NATURE OF MATTE
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- Describe a nonchemical system that is not in equilibrium, and explain why equilibrium has not been achieved.arrow_forwardDistinguish between the terms equilibrium constant and reaction quotient. When Q = K, what does this say about a reaction? When Q K, what does this say about a reaction? When Q K. what does this say about a reaction?arrow_forwardAt a certain temperature, K=0.29 for the decomposition of two moles of iodine trichloride, ICl3(s), to chlorine and iodine gases. The partial pressure of chlorine gas at equilibrium is three times that of iodine gas. What are the partial pressures of iodine and chlorine at equilibrium?arrow_forward
- Kc = 5.6 1012 at 500 K for the dissociation of iodine molecules to iodine atoms. I2(g) 2 I(g) A mixture has [I2] = 0.020 mol/Land [I] = 2.0 108 mol/L. Is the reaction at equilibrium (at 500 K)? If not, which way must the reaction proceed to reach equilibrium?arrow_forwardHydrogen gas and iodine gas react to form hydrogen iodide. If 0.500 mol H2 and 1.00 mol I2 are placed in a closed 10.0-L vessel, what is the mole fraction of HI in the mixture when equilibrium is reached at 205C? Use data from Appendix C and any reasonable approximations to obtain K.arrow_forward12.103 Methanol, CH3OH, can be produced by the reaction of CO with H2, with the liberation of heat. All species in the reaction are gaseous. What effect will each of the following have on the equilibrium concentration of CO? (a) Pressure is increased, (b) volume of the reaction container is decreased, (c) heat is added, (d) the concentration of CO is increased, (e) some methanol is removed from the container, and (f) H2 is added.arrow_forward
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