Consider the equation ∆G = ∆G ° + RT ln( Q ). What is the value of ∆ G for a reaction at equilibrium? What does Q equal at equilibrium? At equilibrium, the previous equation reduces to ∆G° = − RT ln( K ). When ∆ G ° > 0, what does it indicate about K ? When ∆G ° < 0, what does it indicate about K? When t ∆ G ° = 0, what does it indicate about K ? ∆G predicts spontaneity for a reaction, whereas ∆G ° predicts the equilibrium position. Explain what this statement means. Under what conditions can you use ∆ G ° to determine the spontaneity of a reaction?
Consider the equation ∆G = ∆G ° + RT ln( Q ). What is the value of ∆ G for a reaction at equilibrium? What does Q equal at equilibrium? At equilibrium, the previous equation reduces to ∆G° = − RT ln( K ). When ∆ G ° > 0, what does it indicate about K ? When ∆G ° < 0, what does it indicate about K? When t ∆ G ° = 0, what does it indicate about K ? ∆G predicts spontaneity for a reaction, whereas ∆G ° predicts the equilibrium position. Explain what this statement means. Under what conditions can you use ∆ G ° to determine the spontaneity of a reaction?
Solution Summary: The author explains that thermodynamics is associated with heat, temperature, and its relation with energy and work, but it gives no information about the time required for the process.
Consider the equation ∆G = ∆G° + RT ln(Q). What is the value of ∆G for a reaction at equilibrium? What does Q equal at equilibrium? At equilibrium, the previous equation reduces to ∆G° = −RT ln(K). When ∆G° > 0, what does it indicate about K? When ∆G° < 0, what does it indicate about K? When t ∆G° = 0, what does it indicate about K? ∆G predicts spontaneity for a reaction, whereas ∆G° predicts the equilibrium position. Explain what this statement means. Under what conditions can you use ∆G° to determine the spontaneity of a reaction?
The equilibrium constant, Keq, for the isomerization of dihydroxyacetone phosphate (DHAP) to glyceraldehyde 3-phosphate (GAP) is 0.0475 under standard conditions (298 K, 1 atm, pH 7). Calculate ∆G ̊’ for the reaction.
What is ∆G’ for the isomerization reaction when the initial concentrations of DHAP and GAP are 2.2 ́ 10-4 M and 2.9 ́ 10-6 M, respectively? Assume a temperature of 298 K. The same enzyme catalyzes the reverse reaction, the isomerization of GAP to form DHAP. Assume the concentration of GAP remains constant at 2.9 ́ 10-6 M. What is the maximum concentration of DHAP that allows the reaction to proceed spontaneously in this direction?
At 415 K, ∆G = -31.0 kJ/mol for the reaction 2 A (g) → B (g). If the partial pressures of A and B are 2.50 atm and 0.650 atm respectively, what is ∆G° for this reaction?
A student determines the value of the equilibrium constant to be 4.03×10-18 for the following reaction.Fe3O4(s) + 4H2(g)3Fe(s) + 4H2O(g)Based on this value of Keq:G° for this reaction is expected to be (greater, less) fill in the blank 1 than zero.Calculate the free energy change for the reaction of 2.37 moles of Fe3O4(s) at standard conditions at 298K. G°rxn = kJ
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The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY